Thus, in the underhood space there are units, the malfunction of which affects the dynamics of the car.
There are many reasons for the deterioration of dynamics, the main ones are the following.
1. Engine malfunction – decreased compression in one or more cylinders, additional air being sucked into the engine intake tract. Coking of the exhaust system or damage to the exhaust gas neutralizer.
2. Fuel system malfunction – clogged injectors, fuel filter and fuel supply system hoses. Insufficient fuel pump supply. Use of low-quality fuel.
3. Malfunction of the ignition system – failure of the spark plug, breakdown of the high-voltage circuit of the system.
4. Engine control system failure – failure of the system sensors. If any sensor fails, the electronic control unit switches to a backup program, allowing you to get to a garage or car service, but the engine's power and economic characteristics are reduced.
5. Clutch slippage due to wear or misalignment.
6. Malfunction of the braking system – braking of one or more wheels while driving, incorrect adjustment of the parking brake.
7. Insufficient air pressure in the tires.
8. Overloading the vehicle.
A full diagnostic of the car should be carried out by highly qualified specialists using special diagnostic equipment, so contact a car service.
You can carry out the following work yourself.
1. Check and adjust the air pressure in your tires to the correct level.
2. Check the operation of the service brake system and the parking brake. It is not necessary to remove the wheels for this. Find a flat section of the road and, in dry, windless weather, conduct a test run to determine the coasting of the car. The car must be fully fueled, with only the driver in the cabin. Accelerate the car to 50 km/h, equalize the speed, then turn off the gear and move by inertia until a complete stop. Do another run in the opposite direction. The coasting should be about 500 m.
3. Check the operation of the ignition system as described above.
4. Check the clutch operation. The initial check is carried out on a level, obstacle-free area. Use the accelerator pedal to set the crankshaft speed to high idle speed – approximately 1500 min⁻¹. Brake the car with the parking brake. Depress the clutch and engage first gear. Then begin to smoothly release the clutch pedal. If the engine stalls, the clutch is working properly and is not slipping. If the engine does not stall, the clutch is worn out and requires replacement.