Causes and solution to the problem when the engine stalls when you press the clutch

Author: Victor

If the engine stalls when you press the clutch, this may be due to various reasons. Starting from the breakdown of sensors and ending with the incorrect operation of the main components and assemblies of the machine. We will talk about solving these problems in this article.

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Most common reasons

First, let’s look at why, when you press the clutch pedal or when braking, the car’s injection system malfunctions and the engine stalls:

1. Failure of the idle speed controller. If the car stalls when you press the pedal, you need to diagnose this sensor. This can happen both while driving and at the beginning of the movement. When the driver increases idle speed by pressing the gas, the engine recovers and continues to function. But if the power of the power unit does not increase, the engine stalls again. To solve the problem, you need to check the functionality of the controller, the integrity of the electrical circuit, and also clean the contacts on the connector. If this does not help, the sensor must be replaced.
2. Malfunction in the throttle assembly. When you push in the clutch and brake, a clogged throttle body can cause the engine to stall. This unit in a vehicle is used to regulate the volume of the air-fuel mixture that is formed in the engine. Due to poor quality gasoline and other factors, the valve sometimes becomes clogged. To avoid problems when the internal combustion engine stalls when the clutch is depressed, it is recommended to use only high-quality fuel. The only solution to the problem is to clean the damper. If the unit is worn out and cannot perform its functions even when cleaned, it must be replaced.
3. A problem occurs when the driver presses the clutch pedal to change speed or presses it while braking, the engine begins to “trouble” and eventually stops. The malfunction is often associated with a failure of the throttle position controller. If cleaning the damper does not help solve the problem, you need to diagnose the sensor. Most manufacturers do not regulate the replacement of this device, since the controller is installed for the entire service life of the vehicle. But the sensor can fail and lead to the problem of spontaneous shutdown of the power unit. It is necessary to diagnose the controller, check the integrity of the contacts on the connector and the wiring. If these elements are intact and cleaning the plug does not help, the device must be replaced.
4. Malfunction of the fuel filter device. When the filter's service life comes to an end, it begins to work incorrectly. Often its malfunction is associated with the regular use of low-quality fuel. If the filter becomes clogged, the speed drops, and the car may stall not only when the clutch is depressed, but also when driving in gear. Cleaning the device may solve the problem, but not for long. It's better to change it.
5. Malfunction of the fuel pump. If the device breaks down, it will be impossible to start the car engine. But if the pump does not work correctly, but still performs its functions, then the engine will periodically stall. Malfunctions in its operation occur as a result of the constant use of low-quality fuel. To solve the problem, the device is checked and repaired. If the pump is broken, it must be replaced.
6. The generator device may also be causing the problem. A breakdown of this unit will result in all electrical appliances in the car being powered by the battery. If the generator set fails, the engine may stall randomly. But such a problem actually happens quite rarely.

The Mir Matizov channel in its video offers a more detailed look at the reasons for the engine stopping.

What to do if your VAZ-2110 (8-valve injector) doesn’t start well: reasons

There are many reasons why the fuel-injected VAZ-2110 with 8 valves does not start well after an overnight stay. A particularly common situation is when everything was fine in the evening, and in the morning an unpleasant surprise is discovered in the form of a non-working car. Next, we will consider what reasons can lead to difficulties in starting the injection VAZ-2110 and what to do to fix the problem.

To determine why a car has trouble starting, you need to know how it works. A spark is responsible for starting the engine, which, in turn, is completely dependent on the ignition system and the fuel-air mixture, supplied in precisely metered proportions.

If one component of this chain is broken, starting is problematic or completely impossible.

Solution

The procedure to correct the problem depends on the type of problem. If the engine stalls when you press the clutch or brake on a car with an injector, you can solve the problem yourself. Let's consider all cases of troubleshooting.

Cleaning the throttle valve

To complete the task, you will need a special cleaning agent; it can be purchased at any automotive store. There are many types of cleaners, you can choose something to suit your budget. The procedure for dismantling the unit depends on the design features of the car; it can be performed in different ways.

Throttle valve before and after cleaning

Let's consider the removal process using the Daewoo Lanos model as an example:

1. Open the hood of the car and remove the damper. To do this, loosen the clamps securing the air supply hose and remove it. Disconnect the wiring connectors from the idle speed controller and throttle position control.
2. Disconnect the assembly control drive cable.
3. Using pliers, pull the clamps off the damper heating hoses. There is no need to disconnect the hoses. Unscrew the expansion tank cap to relieve pressure in the system, then tighten it. Dismantle the pipes one by one to prevent refrigerant leakage from the system, and close the resulting holes. This will require M10 bolts.
4. Using a 12 or 13 socket wrench, depending on the size of the bolts, unscrew the parts securing the throttle device. Carefully dismantle the assembly, while trying not to damage the sealing element. Assess its condition. If necessary, the rubber band is replaced with a new one if it is very worn.
5. Using a Phillips head screwdriver, remove the two bolts securing the idle speed controller to the throttle body. There is a gasket on the sensor, don't lose it.
6. You can now perform rinsing. Take the purchased product and use it to clean the unit, including all channels. You can also wash the idle speed sensor. Clean the air lines, as well as the calibrated positive crankcase ventilation duct. Usually it is its contamination that leads to malfunctions in the operation of the internal combustion engine. To clean it you will need a pin or needle.
7. Assemble the device and check how the power unit operates.

1. Cleaning the dismantled damper with a special agent

2. Cleaning the forced crankcase ventilation channel with a needle

Replacing the idle speed sensor

Let's look at the procedure for replacing a device using a VAZ car as an example:

1. Turn off the ignition and open the hood of the car. Locate the mounting location of the idle speed sensor. Disconnect the negative terminal from the battery. To find the controller, use the service book for the car.
2. When the sensor is found, disconnect the wiring connector from it. The plug is usually attached to the controller using a clamp.
3. Unscrew the bolts securing the device to the throttle hose. Dismantle the controller.
4. Install a new device instead of the old one. The installation procedure is performed in reverse order. If there are sealing elements on the sensor, treat the rubber bands with motor fluid.
5. After installation, calibrate the device. Reconnect the disconnected battery terminal and activate the ignition. There is no need to start the engine. Wait about 10 seconds, then turn off the ignition.

Replacement of TPS

The procedure for replacing the throttle position controller is as follows:

1. Check the location of the sensor in the service book for the car. Typically the device is mounted in the engine compartment on the throttle hose.
2. Using a screwdriver (usually a Phillips head), remove the two bolts securing the controller to the hose.
3. Remove the device and replace it. Clean your contacts. Install the new sensor and connect it. Check functionality.

The video from the channel In Sandro's garage shows the procedure for replacing the idle speed sensor, as well as the throttle position controller using the example of a VAZ car.

Changing the fuel filter

Depending on the vehicle, the fuel filter element can be installed separately from the fuel pump or in conjunction with it. If the manufacturer does not provide for replacing the filter, then the element is mounted in the fuel pump. In other cases, the device may be located in the engine compartment or under the bottom of the car.

How to change the fuel filter if it is installed independently:

1. Turn off the ignition.
2. Find the fuse box and remove from it the part responsible for the operation of the fuel pump.
3. Start the power unit and let it run until it stalls spontaneously. This indicates that the pressure in the fuel line has been released.
4. Find the location where the filter will be installed. If you have difficulty finding, use the service book. Filters, which are installed separately from the pump, are made in the form of a cylinder with two fittings. Nozzles are connected to each fitting - one at a time the fuel enters the filter device, and the other it is fed further into the engine. Disconnect both pipes by loosening the clamps securing them in advance.
5. Before dismantling, place a container under the filter to allow some of the fuel to drain into it.
6. Remove the device. Before installing a new filter, clean the hoses to remove any dirt. When installing, take into account the location of the arrows on the body of the filter device. They should be directed towards the engine from the tank.
7. After installation, install the safety device. Start the power unit. During the first attempts, difficulties may arise due to the lack of pressure in the fuel system. When the engine is started, inspect the installation location of the device. Fuel leaks are not allowed. If the fuel leaks, you need to tighten the clamps on the pipes more tightly or change them.

The Auto Repair channel published a video showing the procedure for replacing the filter device in a Chevrolet Lacetti.

If the device is assembled with a fuel pump, the replacement procedure will be slightly different:

1. Remove the pump fuse to relieve pressure.
2. The pump itself is located in the gas tank. Unscrew the rear seat bolts and remove the lower part.
3. Below it you will see a hatch. It is attached using self-tapping screws or bolts. Depending on the type of fastening, use a Phillips screwdriver or a wrench. Remove the hatch.
4. Below it is the pump itself. It is necessary to disconnect all connectors with wires connected to the device. Also disconnect the lines connected to the pump, first placing a container under them. Some of the fuel will come out of the hoses.
5. Clean the top of the fuel pump from dirt. Otherwise, contaminants may get inside, which will not lead to anything good.
6. Dismantle the pump by disconnecting it from its mountings. The types of fasteners may vary depending on the car.
7. After removal, the device must be disassembled. The filter element itself is made in the form of a mesh, which allows fuel to pass through and become dirty. Remove the fuel level and pressure sensor, if installed in the pump. Remove the filter and replace it with a new one. There is no point in cleaning the mesh. This will help for a while, but the filter will still have to be changed. Install a new mesh into the pumping device and reassemble it in the reverse order.
8. Connect the fuse and start the engine. Evaluate the quality of its work after the repair has been completed.

Prevention is better than repair

But first of all, it is necessary to find an answer to the question of why the VAZ-21124 jerks during acceleration. On the face of it, it doesn't seem like a very ordinary question. But in fact, such twitching becomes not funny at all. You start to feel especially creepy when the VAZ-21124 jerks during acceleration and the check light comes on. Trouble has become reality.

It has long been known that any breakdown is easier to prevent than to fix. Therefore, try to pay more attention to your vehicle while driving. And here a problem arises: not every driver can feel the car and determine the cause in time.

You should immediately decide on the sequence of actions:

1. Checking the car for twitching while idling is unacceptable. This should only be done when moving.
2. The check should begin on the smoothest and least dangerous section of the route, where there is no heavy traffic.
3. To check, start shifting gears one by one by pressing the gas pedal on each gear.
4. If the vehicle begins to jerk without your participation, therefore, the root cause of the problem must be sought in this problem.

Video “Guide to Replacing the Fuel Filter”

The channel In Sandro's garage, using the example of tenth generation VAZ cars, offers to familiarize yourself with the process of changing the filter device, described in the video.

Do you have any questions? Specialists and readers of the AUTODVIG website will help you ask a question

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