Why does the trimmer stall at idle
If it stalled when opening the damper
If the equipment works properly at idle, but stalls when the air damper is opened, this indicates the penetration of air into the system through cracks in the fuel supply hose or damaged oil seals. In order to fix the breakage and adjust the operation of the tool without sucking air from the atmosphere, it is necessary to replace the damaged parts.
Another possible cause of a breakdown is a malfunction of the carburetor dosage system. To fix this problem, it is better to contact the professionals.
Preventive measures and rules of operation
In order for the lawn mower to function properly and not stall when started, it must be properly stored and operated. Compliance with the following simple recommendations will allow you to forget about problems.
- When mowing grass, the condition of the cooling system must be monitored. It is also necessary to regularly clean the channels in the housing and the ribs of the starter.
- Use kerosene, thinner or other detergent to clean the instrument.
- Do not clean the instrument while it is hot. it must cool down before washing.
- It is important to observe the recommended operating mode to avoid overheating of the engine.
- If the scythe is not used within the next thirty days, the fuel must be drained, otherwise it will decompose into heavy components that can clog the channels of the carburetor.
- After the fuel has been drained, the trimmer should idle for a while until it turns off. This will completely get rid of the remaining working mixture inside.
To store the tool in cold weather, you must:
- completely drain the fuel;
- disassemble the lawn mower, wash and clean all available components;
- inspect the condition of the parts, eliminate all defects that can be corrected;
- pour the prescribed amount of oil into the gearbox;
- clean the air filter;
- partial disassembly of the engine, wash, blow out and lubricate all moving parts;
- to lubricate the piston, unscrew the candle, then use the starter to raise the piston to top dead center, pour a small amount of oil into the hole for the spark plug and turn the crankshaft several times.
Important! If it is not possible to store the trimmer in a warm, dry room, you must first wrap the motor with an oiled rag.
Only by observing these rules, you can be sure that the lawn mower will work properly and will not stall for a number of seasons.
As you can see, there are many reasons for the trimmer to stop working. Most of them can be corrected by yourself using the user manual. In cases where there is no self-confidence, it is recommended to take the equipment to repair. It is worth remembering that the wrong actions can cause even more harm to the trimmer. As a result, repairing lawn mowers will cost significantly more than it would have been originally, and in the worst case, you may need to buy a new unit.
If stalled after launch
If the equipment starts and stalls immediately after starting, this indicates an incorrect setting or misalignment of the device. As a result, fuel does not flow to the engine evenly, resulting in significant vibration and trim disengagement. To fix the breakdown, it is necessary to reconfigure the device according to the user’s manual.
Another probable problem is a clogged gasoline supply valve. It needs to be cleaned.
On a note! If the trimmer starts but stalls immediately, it may also mean that fuel is having difficulty moving to the carburetor. The weakening of the valve will help to eliminate the problem. this will ensure uniform and free circulation of fuel in the device.
Another possible cause is a damaged fuel intake hose. Air can enter the system through cracks and holes. To solve the problem, you need to increase the engine speed in order to get rid of air bubbles that have penetrated into the device.
If stalled during idle operation
If the lawn mower stalls while idling, there may be several factors.
- First you need to check the prepared fuel solution when it comes to a four-stroke trimmer that runs on a gasoline-oil mixture. There is a possibility that it was made incorrectly. the proportions are not maintained. Because of this, the gearbox heats up, and the revolutions on the drum decrease.
- Another likely cause is a clogged element such as the throttle valve, air filter, or carburetor. The specified parts need to be cleaned.
- Another possible factor is misalignment or misalignment of the carburetor. You need to re-configure according to the instructions.
- Observe this problem mono even when the air damper is opened. In this situation, the lack of fuel for the trimmer occurs due to the air flow.
If the device does not have enough fuel, it works properly at high speeds or when they increase, but stalls at idle. If the root of the problem lies in the carburetor, the mower will shut off on both cold start and hot start.
Trimmer stalls. how to fix the problem
The petrol trimmer is a useful tool for clearing unwanted grass from house areas and large lawns. The design of this technique is quite complex, therefore, if the device breaks down, there may be several reasons. The most likely factors causing the breakdown are usually described in the user manual. Knowing why the trimmer stalls, you can try to fix the defect yourself. The most common malfunctions that provoke a stop of lawn mowers, and the possibility of repairing them with your own hands. in the material below.
If stalled after gas supply
Owners of gasoline scythes quite often mention that the lawn mower stalls when you press the gas. Typically, such a breakdown occurs due to a malfunction in the carburetor. Failure in its operation can occur due to prolonged storage, use in difficult conditions, significant overload of the motor. Vibrating movements of the device during operation will become a symptom of such a breakdown.
On a note! Users familiar with car carburetor repair can try to repair this important trimmer assembly on their own using the instruction manual. Otherwise, the right decision would be to contact the service center representatives for help.
Sometimes the trimmer stalls when you throttle because the fuel valve is clogged. This interferes with the supply of gasoline. To fix the problem, it is enough to loosen the valves. This will restore the normal fuel supply to the carburetor.
Another possible reason the mower stalls when gas is applied is a dirty breather (check valve). This part prevents the formation of a vacuum in the gas tank. If it is clogged, air does not flow, which means that fuel does not go to the carburetor. To fix the problem, you need to clean this element.
If stalled when heated
the lawn mower often stalls when heated. It looks like this. the tool starts up, works “jerky” (not smoothly) and quickly stalls. This situation occurs due to fuel boiling in the carburetor or an incorrectly selected damper, which should not be disk, but rotary. In the latter case, if an error is found, the part must be replaced.
If stalled without gaining momentum
If the trimmer does not pick up speed and turns off, there may be several reasons. The most common culprit is a clogged air filter. It must be pulled out and cleaned, if necessary replaced.
On a note! The trimmer could stall without gaining speed due to a carburetor malfunction. The unit for repair or replacement must be taken to the service center.
Another possible malfunction is related to the mechanics of the motor drive. This part of the trimmer must be thoroughly cleaned and the inner cables must be lubricated.
You also need to make sure that the cable in the carburetor has not slept. Before using the trimmer for the first time, check this structural element to ensure that it is firmly and not tightly tensioned. Otherwise, the cable may crack, resulting in costly repairs.
the lawn mower often stops when it heats up. At the same time, it starts up, works “jerky” and gradually stops. This process occurs when the gasoline in the carburetor boils or the damper is installed in a rotary rather than disc type. In the latter case, the part is changed.
It happens that the trimmer heats up if the ignition circuit wire or coil is damaged. In order for the device to start working normally, replace parts.
At high revs
When the scythe stalls at high speeds, this is due to the following problems:
- clogging or sticking of the valve located on the gas tank cap;
- the carburetor is out of alignment under the influence of vibrations arising from the operation of the mechanism;
- problems with the circulation of the fuel mixture;
- suction of atmospheric air;
- the fuel intake hose is cracked or loose.
Adjust the carburetor referring to the trimmer operating instructions. For adjustment, it is often sufficient to loosen the tightening of its housing. If there are problematic points with the circulation of the fuel mixture, then it can gradually enter the carburetor. After its development, the engine stalls at high speeds.
Immediately after wound up
The unit may stall immediately after starting if the carburetor is misaligned or incorrectly adjusted. this causes an uneven fuel supply. The result is that the device vibrates distinctly. For troubleshooting, the carburetor is reconfigured, following the instructions for the mechanism.
Also, the engine stops when the fuel supply valve becomes clogged. In such cases, it is sufficient to simply clean it. If the lawn mower started working at first, but then immediately stalled, then it is possible that the fuel enters the carburetor unit with some difficulty. The weakening of the valve helps to solve the issue, which ensures free circulation of the mixture in the system.
The stoppage can also be caused by air leaks in the presence of mechanical damage to the hose (holes, cracks) that takes the fuel. In this case, add more revolutions to the drive in order to quickly expel air bubbles from the system.
At idle speed
At idle, common reasons for stopping the trimmer are as follows:
- contamination, misalignment or incorrectly adjusted carburetor adjustment;
- clogged air filter;
Replacing the air filter for lawn mowers
Trimmer air filter
- reducing the speed of the gearbox when it heats up, which is a consequence of the use of an unsuitable fuel mixture;
- clogged throttle;
- air entering the system;
- not enough fuel to operate the lawn mowers.
If the problem area is the carburetor, then the equipment will stop at both “cold” and “hot” start.
Why does the petrol trimmer stall
A scythe with a gasoline drive is a useful thing for owners of home gardens, lawns, and when the trimmer suddenly stalls, the work to clear the area from grass stops. The device itself is a rather complex mechanism, so there are many different reasons for its breakdown. The most common malfunctions are contained in the operating instructions. You should know the reasons why the trimmer stalls in order to effectively repair the device yourself.
What could have broken
Problems with the lawn mower due to the fact that this device does not start are classified in a certain way by service specialists. They highlight faults with the following components of the mechanism:
- an engine in which the piston and bearings may wear out or fail, crack the crankcase;
- the fuel supply system, while the filter may be clogged or problems with the carburetor;
- mechanical damage to wires, tubes, hoses;
- ignition circuit.
To correctly determine the node where the breakdown occurred, you need to pay attention to the circumstances under which the trimmer stalls.
When you hit the gas
If the lawn mower stops when the throttle is pressed, the reasons may be as follows:.
- The most common option is carburetor adjustment failure, which occurs when the drive is under heavy load, after prolonged inactivity of the mechanism, or when it is used in difficult conditions.
- Clogging of the fuel valve, which is eliminated by loosening it, as a result of which gasoline begins to flow normally through the system.
- Looseness and dangling of the cable in the carburetor. The fuel hose may also be stretched to the point of rupture due to significant stress.
- Clogged breather (check valve), as a result of which fuel does not enter the tank.
If the problem is with the carburetor assembly, the lawn mower vibrates to recognize it. When the hose bursts or the cable is stretched, these components are replaced.
When the air damper is opened
It happens that the unit stalls when the air damper is opened, normally idling. This is due to air leaks in the system, caused by cracks in the fuel hose or problems with the oil seals. The carburetor metering system may also malfunction, and the lawn mower will stop after opening the damper.
Fuel hose in carburetor
All the possible reasons that the lawn mower stalls, and how to fix them, are contained in the following video.
There are many reasons for stopping lawn mowers, but the most common malfunctions associated with its carburetor. They can occur in any case. The most problematic option is when a serious breakdown occurs, and you need to purchase new parts or change the lawn mower.
In order for the trimmer to work normally for a long time, you must strictly follow the instructions for use. It is necessary to fill the unit with a suitable fuel mixture, the unit should operate at moderate load.
Homelite weedeater carburetor adjustment
Why does the injector, carburetor stall at idle speed? Causes
08 October 2016 Category: Car Fault Diagnosis
Car enthusiasts often face various problems during the operation of the car.
Trimmer won’t stay running, fixed.
over, the frequency of occurrence of problems does not depend on the car brand, its price, service life and other characteristics. For example, you have a good foreign car, but one morning after sitting behind the wheel of the car and turning the key in the ignition, the car started up, but as soon as you took your foot off the gas pedal, it “sneezed” and stalled. These are problems with engine idling.
In the article we will try to figure out why the engine stalls at idle speed in an injector or carburetor. It is worth noting that the causes of the problem can be trivially simple, and you should not immediately call a tow truck to deliver the car to a service station.
A common and commonplace reason for both the injector and the carburetor is a lack of air in the combustion chamber due to a clogged (dirty) air filter. Such cases are especially common in rural areas or among those who like to drive through fields, forests.
The way out of the situation is simple, just follow these steps:
- Pull out the filter;
- Try to start the car without it.
If the engine began to run smoothly at idle, then the whole problem is in the filter. You can try to clean the filter as much as possible and continue driving, and upon arrival home, purchase and install a new element. But in no case try to operate the car without it, it is destructive to the engine.
What conclusion should be drawn from all this for yourself? You need to be more careful when replacing filters. And if you often drive in dusty areas, it is worth changing them more often.
However, this is the simplest and most easily eliminated reason that the engine stalls at idle speed. Other problems will require a lot of effort and expense on your part. Below we will consider the main engine malfunctions with an injector and a carburetor.
But in a carburetor car, you can do without a service station much more often than in an injection car. Such a car has less electronics, so it’s much easier to understand why the engine stalls at idle.
First of all, it is worth starting to diagnose the carburetor by checking the electronics, namely, from the solenoid valve, which is screwed into the carburetor. Checking it out is simple:
- The first step is to turn on the ignition.
- Next, you need to disconnect the wire suitable for the carburetor and reconnect.
If you hear a click, then this means that the sensor is working and the reason is not in it. There is another option that it clogged, it is worth unscrewing and blowing out the jet. Sometimes the filter fails, then small debris can clog not only the valve, but also the carburetor itself.
Malfunctions at idle speed of the injector and carburetor
It should be understood that most of the problems that lead to the engine stalling at idle speed can occur in both injection and carburetor cars. Therefore, it is more rational to consider the faults of the two systems together.
Also, in many cases, problems manifested by an unexpected engine stop at idle speed can include other symptoms of a problem with the car, for example:
- The engine can be tripled under various operating conditions.
- The machine vibrates intermittently.
- Puffs of smoke begin to come out of the exhaust pipe.
- The engine starts with difficulty, the starter has to be turned for a long time.
- The motor, before stalling, runs unevenly, the tachometer needle spontaneously jumps and so on.
over, all this can occur both on a cold one, immediately after starting the engine, and after warming up. In some cases, the engine stalls or runs unstably if you release the accelerator pedal after driving at high revs for a long time. Sometimes this happens at idle speed only on a cold one, and at the slightest pressure on the gas, the car does not stall, or the revolutions immediately equalize and return to normal.
In general, situations happen differently, but this usually happens for two reasons:
- Failure or malfunctioning of any element in the machine.
- All this is a consequence of the clogging of the system.
In any case, a thorough check of the main elements of the car is required to accurately identify the problem unit.
In total, there are several main options for malfunctions associated with the idling of the injector and carburetor, such as:
- Malfunction or complete failure of the idle speed regulator.
- Clogged or damaged throttle assembly.
- Reduced the efficiency of the injector, injectors.
- Fuel injection system problems.
- Fuel pump malfunction.
- Clogged fuel pump filter mesh.
- Dirty carburetor.
- Air leaks from the outside in the system.
- Clogged fuel or air filter.
- Ignition system failure: module (coil) failure, wire breakage or breakdown, plugged spark plugs.
- Malfunction of the throttle position sensor, mass air flow and other elements.
Contact or electronic ignition can also malfunction. Check the wires with a tester. Next, check the candles, if they are brick-colored, then the problem is not with them. Wet candles indicate that there is an excess of fuel. this is a problem either with the injector (carburetor) or with the ignition.
It is also worth looking at the distributor cap. Pay attention to contact wear or cracks. If any defects are found, the element must be replaced.
When cleaning the sensors, assemblies, tightening the clamps on the hoses, replacing candles and filters does not help, the injector idle is not restored, the engine stalls, then you should contact a specialist for diagnostics. To specifically replace the sensor that is out of order, and not buy everything at random and change it in turn. This option is subsequently more reasonable and profitable, both in terms of saving money and in terms of time spent on troubleshooting.
Hoses, gaskets, manifold plugs are all subject to inspection and affect idle speed. For example, the loss of tightness of the intake manifold is almost impossible to detect at home. At the station, they look for air leaks using a smoke generator. So with a new car, especially if it is under warranty, it is recommended to visit special stations, and do not go into the injector with a soldering iron.
How debris gets into a car engine?
Very simply, low-quality gasoline, there is a lot of it now, even if you only refuel at gas stations. Gasoline mixed with gasoline and also with all sorts of garbage. impurities, there are a lot of them, they are debugged in the elements of the fuel system and harm the engine.
Quarrels can accumulate in the tank for years, along with water, rust, and so on. With each refueling, long-term sediment from the bottom of the tank can rise and clog filters or enter the carburetor or injector. Therefore, the tank must be periodically cleaned, and all filters must be monitored and replaced in time.
Also, an important role is played by the gas pipeline through which gasoline flows into the combustion chamber. When it consists of rubber compounds that have not changed for a long period, problems may arise:
- The rubber pipes on the outside are cracking and may leak.
- But the worst thing happens on the inside. Rubber elements under the influence of fuel chemical compounds deteriorate over time. And together with gasoline, small pieces of slag and rubber begin to move into the engine.
These rubber connections can also be installed behind the filters. Therefore, in order to avoid this, it is worth changing the hoses in time, and most importantly, installing high-quality. oil and petrol resistant.
If everything has been checked, and the idle speed of the injector or carburetor has not returned to normal, the compression in each cylinder should be measured. Perhaps the engine resource limit has come or you refueled with bad gasoline and put a heavy load on the engine, the rings could not stand it and burst.
In the worst case, the piston may be damaged altogether. These are all mechanical problems in which the engine will also not be able to idle smoothly.
That’s all we wanted to say in the article today. We hope we have answered your question as to why the injector or carburetor stalls at idle speed. If you have any questions, we will be happy to answer them in the comments. Good luck!
What to do if your lawn mower starts and stalls?
Now let’s consider all the above described problems in more detail.
- The lawn mower stalls when you press the gas.
In principle, there can be a huge number of reasons why the engine of a lawn mower stops working when you press the gas. We will consider here only the most common.
Perhaps the air damper is just clogged. And to eliminate the problem that has arisen, it will be enough just to clean the air damper. Also, the engine stalls due to a clogged air filter. To clean it, the filter should first be washed in a solvent and then blown out with a stream of compressed air.
A similar procedure should be carried out with a clogged fuel filter, which prevents the flow of fuel in the proper volume when the engine speed is increased.
The engine can also stall for other reasons. Firstly, the spacer located between the cylinder and the carburetor worn out, and secondly, the crankshaft oil seals began to suck in air.
lawn mower stalls when heated.
We have already pointed out that in this case the problem is in the carburetor. Due to the increased temperatures, gasoline begins to boil in it, due to which the air-fuel mixture ceases to form or its quality is critically reduced.
In addition, this problem may arise due to the fact that the carburetor is equipped with a rotary valve, not a disc valve. If the problem has become chronic, then it should be solved radically. by purchasing a new carburetor with a disc damper.
the lawn mower starts and stalls.
Most likely, access to the fuel tank is difficult or completely absent, due to which a low pressure zone forms in it, due to which the engine stops receiving fuel in the required amount and because of this it stops working.
lawn mower stalls at idle speed.
The engine at idle speed can stall for the following reasons:
- Gearbox is too hot
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he got up and began to prepare a not quite normal gasoline solution, which is why the revolutions on the drum began to drop;
Why the lawn mower stalls?
In this article we will look at the problem, why the lawn mower stalls and how to deal with this problem.
Even very good lawn mowers can have trouble starting. For example, it starts up and stalls. Most likely, this indicates problems with the filters. air or fuel. If it stalls at idle, then, most likely, the lawn mowers have problems with the carburetor, which overheats too quickly and can no longer cope with the formation of a high-quality air-fuel mixture.
If the trimmer stalls when you press the gas, i.e. when the engine starts to run at high revs, then this indicates a problem with the carburetor or with the fuel filter.
Problems with lawn mowers with an air filter will be indicated by the fact that it stops working when the air damper is opened.
What to do if the trimmer stalls when you press the gas?
So why does the trimmer stall when you press the gas? There can be several reasons for this problem.
- The carburetor is out of alignment after an unsuccessful wintering or after too much use of the lawn mower. The petrol trimmer runs on an air / fuel mixture prepared by the carburetor. If incorrectly adjusted, this mechanism prepares a lean mixture, which is not able to provide the engine with a sufficiently high speed. You can understand the problem with the carburetor by the characteristic vibrations of the lawn mowers.
- You will know about a clogged fuel filter by the fact that the trimmer starts and stalls. In other words, there is enough fuel flow to start the mower, but not enough to keep the engine running. It may be possible to solve the problem by loosening the valves on the filter. If not, you should wash the filter in solvents and blow it out with compressed air. If after that the problem is not solved, then you should purchase a new fuel filter.
- If the engine stalls at speeds close to maximum, then there may be a problem with the breather, which regulates the air supply to the gas tank. When fuel is consumed too quickly, which is typical when you give gas, a rarefied pressure is formed in the gas tank, due to which the flow of fuel into the engine is reduced.
- The engine stalls when the choke is opened. The problem, again, is associated with the carburetor, which, due to excess air, prepares a lean air-fuel mixture, which is not capable of ensuring engine operation.
lawn mower stalls on hot? There is a solution!
the lawn mower stalls when hot. this means that there is already a certain amount of fuel in the engine to start the engine, but after 5-10 minutes of operation, it stops working. This behavior of the engine indicates problems with the fuel filter.
There are two solutions. preventive and radical. Preventive is to try to clean it, which will consist in cleaning the contamination with a solvent, and then blowing the filter with a jet of compressed air.
But in case of severe pollution, you can fix the breakdown only by applying a radical solution. this is the purchase of a new fuel filter.
Why diesel stalls on the go
Most modern diesel engines are equipped with a Common Rail injection system.
This system is fundamentally different from the classic plunger pumps that were used on diesel engines of previous generations. To understand the principle of operation of the common rail and its typical malfunctions, we will briefly consider the principle of operation of this system.
As a rule, the driver of a diesel car knows that diesel fuel should be poured into the tank, not gasoline, that the smell of the exhaust of his car differs from the gasoline counterparts. This is already something, but in fact there are much more differences.
The principle of operation of a diesel engine in a simple statement looks like this: fuel under high pressure is sprayed into the cylinder at the end of the compression stroke, while the air in the cylinder is compressed 16-25 times. From high temperatures during compression, small particles of diesel fuel ignite, the fuel combustion process occurs, and due to the expansion of gases, the piston moves downward making a working stroke.
In a classic diesel engine, a high pressure stroke pump and a mechanical injector were used to inject a certain amount of fuel into the cylinder. In short, it works like this:
The mechanical injector is set to a certain opening pressure of the shut-off needle, a portion of diesel fuel is compressed by the high-pressure pump, when the pressure generated by the pump reaches the opening pressure of the injector, fuel is injected into the cylinder. Distributed fuel injection, for each cylinder its own injection pump section and its own injector.
In common rail systems, the injector is electric (it has an electrical element that controls fuel injection into the cylinder). The high-pressure pump does not distribute portions of fuel and does not determine the amount of fuel to be injected, but simply pumps fuel under high pressure into a common distributor (rail) common to all cylinders from which the fuel pipes diverge through the injectors. From this design, the name of the common rail system arose.
The injection system is controlled by the ECU electronic unit using engine sensors, this unit receives information about the engine condition (engine temperature, cylinder position, the amount of air entering the engine, pressure in the intake manifold after the turbine and other data). In the common rail system, there is a rail pressure control system, to determine the causes of our malfunction, we will consider it in more detail.
The high-pressure pump must create pressure up to 1600 bar (in the latest systems), but the maximum pressure is created only at maximum engine power, and at partial loads and idling, the pressure required for normal engine operation is much lower, therefore, there are pressure control elements in the system and rail pressure control elements. The rail pressure is measured by a fuel pressure sensor. Pressure regulation is carried out by the metering unit of the pump together with the fuel pressure regulation valve mounted on the rail, or only by the metering unit of the high-pressure pump. The metering unit or fuel pressure control valve is an electromechanical device that allows the engine control unit to maintain a predetermined pressure in the system by releasing excess pressure into the fuel return line. Structurally, pressure control valves do not have fundamental differences depending on the version, they can have a mesh filter of the smallest particles, different shapes and seals.
Now let’s talk tightly about our problem. Stopping the engine on the move in such systems can occur for several reasons.
1. Fuel does not enter the high-pressure fuel pump (with this malfunction, restarting the engine will be difficult or impossible).
2. The control unit does not receive the signal required for the operation of the system from the crankshaft position sensor. (when this malfunction occurs, the engine cannot be started).
3. Inability to regulate high pressure within certain limits. (with this malfunction, the control unit determines that the set pressure in the rail cannot be set by the system and stops the engine, however, when you try to start again, the engine starts and runs normally).
As a rule, the most common reason for stopping the engine on the move with some frequency is the third reason.
Symptoms of such behavior, in addition to stopping the engine, may be accompanied by the inclusion of a light indication of errors in the control system (the check is on, the spiral is flashing). When the control system DTCs are set, errors related to the pressure control system can be received, which sound like a malfunction of the pressure control valve, high pressure in the fuel line, low pressure in the fuel line, high pressure control limit and other similar DTCs. The fact is that the algorithms for determining the malfunction of the pressure control system for manufacturers of common rail systems are different and therefore such a bunch of different errors, moreover, with a high degree of probability, it is impossible to determine a faulty node in the system and the DTC code in this case is only a hint to the diagnostician in which area has occurred malfunction and which systems need to be checked.
So what could cause such a situation and what needs to be checked first!
1. Leakage of the high pressure system. Due to their design features, common rail injectors discharge a small amount of fuel into the return line during operation. With the wear of the injector elements, the amount of fuel discharged into the return line increases and eventually reaches such volumes that the system is not able to maintain the required pressure in the rail. To check the nozzles for draining, there is a simple test that a diagnostician can conduct, and with some skill, this test can be performed independently in your garage. Details of the test can be found on the Internet; it has been repeatedly described by mechanics and diesel car owners. The same category includes a malfunction of the emergency pressure relief valve. On some systems, a mechanical valve can be installed on the rail, calibrated for an opening pressure of about 1800 bar. During normal operation of the system, the valve is constantly closed, but in some cases, due to contamination, the valve does not close tightly and, in all engine operating modes, fuel flows into the return line, as a result of which the ECU detects a discrepancy between the control parameters and the measured pressure in the rail.
Mechanical failure of the pressure control valve, contamination of the particulate filter on the pressure control valve.
This reason is much less common. As a result of wear, the pressure control valve is seized. This can only be detected by connecting the scanner to the car and comparing the set pressure values with the real ones, but subject to the exclusion of other problems in the system. A microparticle filter is not installed on all high pressure regulators, and to inspect this filter you need to dismantle the valve and at least a magnifying glass, because the filter holes are so small that it is almost impossible to see them with the naked eye. As a rule, a clogged filter of microparticles indicates wear of the fuel pump, the presence of shavings on the filter indicates that the pump has driven the shavings, that is, intensive wear has begun due to an increase in the clearances of rubbing pairs. Some car owners and repairmen remove the filter from the valve allowing the car to work until the complete death of the fuel pump, but as a rule, with this approach, injectors also die, which significantly increases the amount of repairs.
A not uncommon reason for which for the time being they do not pay much attention is not the tightness of the low pressure fuel system. Many cars with common rail systems are equipped with booster pumps in the tank to deliver fuel to the injection pump and maintain the required volume and pressure of about 0.5 bar in the fuel supply system. If the system is not tight, air enters the fuel. Some cars are not equipped with an electric booster pump and the problems of leakage of the low pressure system affect starting. But in any case, the air in the fuel disrupts the normal operation of the injection pump, which leads to pressure surges in the system, which the ECU is unable to fend off. There is one more point to which you should pay attention. On diesel engines, a return loop system is often implemented, that is, fuel from the return line enters the additional inlet of the fuel filter and returns to the high pressure pump, this is implemented to heat the fuel at the inlet to the injection pump. So, if the return pipes are not tight, air enters the pump, which leads to the same consequences as air leaks at the supply.
We have tried to consider some of the typical malfunctions occurring on diesel cars equipped with a modern common rail system, leading to engine shutdown. Of course, there may be other malfunctions with similar symptoms, often requiring equipment experience and time to identify them. For the correct diagnosis of a malfunction, it is necessary to contact a specialist, unfortunately spare parts in modern cars cost a lot of money and diagnostics are replacing a good one with a new, not cheap occupation. Therefore, come to us, to RSV Service, for diagnostics! The question you have been struggling with for a week can take us 15 minutes and you will receive full information about the malfunction of your car and repair methods, without wasting money and time.
P.S. Time passes, everything changes, surprises.
In the winter of 2017-2018, we encountered an interesting fuel defect. The client made a complaint about the machine: “the engine stalls, when driving for a short time, when the gas pedal is pressed, it does not stall at idle speed.” Diagnostics showed: there are no errors, all systems are operating normally, no prerequisites or malfunctions were found. What to do! A slight bewilderment, we check everything again, carefully, we change the fuel filter (although it is not old, 2 km of mileage, there is no water in it), we check the fuel filter, from beginning to end we check the electronics. no complaints about iron and brains! We look “what’s in the tank?”, The liquid is clear (clean. Clean), there are no suspensions, no impurities. Consistency, viscosity. watery! Smell! This is where the interesting begins. kerosene! The temperature outside drops below 10 degrees, everything falls into place, the car starts up well, works, does not stall.
Conclusion: fuel with a large amount of “antigel” additives, frankly diluted with kerosene, pure kerosene. in a diesel engine at temperatures above “-4” behave “strange”, not usual for the driver and service, because the property for which the “winter” fuel is valued does a “disservice” and spoils everything when the diesel engine is running, at an air temperature of about “0” degrees. Most likely, there is a temperature regime at gas stations in which the fuel poured into the tank should work “correctly”, but we do not always pay attention to this information. Be careful, in transient weather conditions, the physical properties of the fuel can play a cruel joke with your diesel!
Best regards RSV Service! Good luck on the road! Fill fuel carefully at filling stations. Check the temperature range of additives and “winter” grades offered at the gas station. By the time the weather changes to “” try to develop “winter” fuel, and reduce the addition of additives, if you use them.
Why does the car stall at idle?
The car engine is very demanding on the quality of fuel and depends on the coordinated work of various systems and sensors. Malfunctions of individual units or elements make their own adjustments to its operation and lead to a violation of some modes of operation of the power plant, including idling.
If the engine of the car stalls at idle, then normal operation of the car is impossible. A defective vehicle in road traffic can provoke a road accident.
Dirty fuel filter.
The main task of the fuel filter is to retain all impurities contained in gasoline or diesel. It requires periodic replacement depending on the frequency of use of the machine and the amount of fuel refueled.
If you skip the replacement intervals and let the situation take its course, it will completely clog up and stop performing its function. Often, contamination of the fuel filter leads to a reduction in the optimal volume of fuel supplied to the combustion chambers.
Throttle valve dirty.
Poor fuel quality and heavy use of the machine lead to clogging of the throttle valve. This compromises the efficiency and quality of its work.
Malfunction of the MAF sensor.
Abnormalities in the operation of the mass air flow sensor or its incorrect operation very often leads to the fact that the engine begins to stall at idle. To eliminate this reason, it is enough to replace it.
Malfunctions in the fuel pump.
In many car brands, the fuel pump is located in the tank, namely in the lower part of it. All impurities contained in the fuel tend to settle over time to the bottom of the tank. Sooner or later, some of them get into the pump and disrupt its operation. If you do not take measures to eliminate the cause of its clogging, it will sooner or later fail.
The idle speed regulator is out of order.
Quite a whimsical sensor susceptible to vibration and temperature changes. Differs in a low margin of safety and low reliability, and especially in domestic cars.
Cold engine stalls or troit at idle.
Early morning hours, regardless of the season, and a cold, unheated engine, which, after starting at idle speed, begins to stall or triple. So that after starting it does not simply stall, the driver has to keep his foot on the gas pedal.
First of all, it is worth checking the engine spark plugs. They become unusable as a result of active use of the machine. Soot forms on their surface and irreversible damage to working elements occurs.
It is necessary to identify the faulty plug and replace it. In principle, nothing complicated and you can fix the problem completely on your own without outside help.
Very often, similar symptoms occur when there are irregularities in the operation of the electronic control unit responsible for the operation of the motor.
A malfunctioning EGR valve can cause the engine to stall at idle when cold. The problem in the operation of the machine can be eliminated only by replacing the exhaust gas recirculation valve.
Why does the car stall at idle?
Hello, dear guests and visitors of the Avtogid.ru blog. Today in the article we will try to figure out why the car stalls at idle speed for no apparent reason at first glance. The situation is very stupid and very annoying. When viewed from the side, it resembles the first driving of an automobile school cadet. The problem with a constantly stalling engine is aggravated by the fact that there can be many causes of the problem and not all of them lie on the surface.
The age of the machine does not affect the frequency of the problem when the engine is idling. Both domestic cars and foreign cars are stalled. It all depends on the specific situation and the cause of the malfunction. You can independently fix problems in the operation of the car without the use of special equipment in some cases.
When a problem is started or when it needs to be solved in a complex, the help of specialists may be needed. A professional mechanic using special equipment is able to diagnose the root of the problem and indicate ways to solve it.
Why the car stalls at idle. causes and solutions to the problem
This type of malfunction can be very often encountered, and it happens with cars of both the domestic auto industry and a number of foreign cars.
This usually happens as follows. You start the car with the engine running normally. But, as soon as you take your foot off the gas pedal, the engine speed drops, although the idle sensor continues to show the nominal speed. At the same time, you hear that the car is unstable at idle. And after a while, the car stops due to the termination of the engine.
It should be noted that there is no need to panic right away: after the next start of the car, the situation stabilizes and you can continue the trip. However, soon the trouble may repeat itself, and the engine stalls again.
Therefore, if you find an unstable propulsion system, take the time to troubleshoot. To start this process, you need to determine the possible causes of such troubles. As a rule, both professionals and amateurs agree here.
The reasons why the car stalls at idle
The reasons for the breakdown are different in each case. Therefore, you will have to apply various actions to eliminate them. If you are a motorist with extensive experience and are well versed in the peculiarities of the functioning of a car, be it a conventional model or a diesel, then everything is fine. After all, this kind of breakdown does not belong to the category of serious and, accordingly, can be independently eliminated. But if you do not have special knowledge or you simply do not have time to deal with such problems. In this case, it is better to use the services of professionals.
Possible solutions to problems
The easiest option, if the car stalls at idle speed, is to contact a specialist.
In this case, the following actions can be taken:
The simplest option is to completely replace the failed equipment. Can fit new idle sensor, car throttle body, throttle position sensor, injector or carburetor.
Trimmer BLUNTS carburetor adjustment.
the lawn mower stalls at idle speed when the air damper is open. What could be the reason? | Topic author: Fedor
Lyudmila It happens that some braids have a plastic flap.
Nina Check the name on your braid nameplate. It should say Stihl, ECHO, makita, etc.
if not, then you bought a kyatai hat! This is the reason!
Dima I’ll correct Artem, see oil 1-50 in the passport, a little more oil is better.
Take the quality of oil and gasoline responsibly. I took LUKOIL oil-
Tags: Why does the trimmer stall at idle speed
Why does the trimmer stall at idle
Why does the Niva stall at idle? | Topic author: NIVA
NIVA (Eberwin) http://www.uazbuka.ru/lib/carb/solex.pdf
Sergey (Quintina) What fuel filter should be changed on the carburetor Niva? Do not heal your ears. Article shit.
NIWA (Eberwin) Something like that. And if you didn’t put it, then shit in your carburetor And the article is simple and affordable. For advanced and interested = link in discussions
Sergei (Quintina) Glohla only when this filter completely dragged from bad gasoline. Look there for yourself. Write garbage for suckers.
Sergei (Quintina) Apparently did not get at gas stations on “normal gasoline”, where the new one is enough for 60-70 km.
NIWA (Eberwin) I don’t save because I didn’t get it. Refuel at trusted suppliers
Sergei (Quintina) And in our Far East, even proven ones are hired. when they sell fuel immediately after the fuel truck has been drained, i.e. the tank is small and overbalanced.
NIWA (Eberwin) You know everything. and refuel, you suffer, so who is a sucker and what does this article have to do with it?
Sergey (Quintina) Article for suckers who repair a car at a service station. They pay money and give them bullshit.
NIVA (Eberwin) Justify or is it such an agreement with the above questions
Vasily (Jakodi) Boorish attitude towards the interlocutor of his!
Or maybe even a PEDESTRIAN?
Sergey (Quintina) Even normal gasoline for the carburetor is enough for up to 100 thousand km, then, replacement or if the head works, then complete disassembly, soaking in acetone and purging. Of all the solvents, only Acetone normally eats away the essential oils that we have in gasoline. There were 2121, 21213 and 214mka, but my father had 2121, 1984, I look after her and only changed the top cover on the carburetor. And an article for divorce LOCHOV at the service station.
Sergei (Quintina) At the expense of 21214m, say, Shit. 2019 and the rear bearing on the kirdyk axle shaft for 9000 km, the main clutch “error code 830” is generally for 2000 km. And at the expense of the body 21213, just load a barrel of 200 liters, and it became softer. And at the expense of the pedestrian, I disassembled Nivasik and cooked it myself from 0 to 100, I will prompt you.
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