The car started moving without problems
1. Before driving, you must fasten your seat belt.
2. Always try to start moving smoothly, because while the car has a minimum speed, the load on the ACE elements of the transmission and chassis is maximum. Therefore, to avoid premature wear, it is necessary:
- A) If the vehicle is equipped with an automatic transmission, do not press the accelerator pedal sharply.
- O) If the car is with a manual transmission, do not abruptly throw the clutch pedal. When starting off, do not hold the clutch pedal for a long time.
- c) Do not make a sudden start with the steered wheels completely turned out. If the car is front-wheel drive, this can damage the boot and / or CV joint (constant-velocity joint), overworking it unnecessarily.
- d) If the start of movement is underway, it is recommended to use the parking brake (in some cases, modern cars are equipped with assistance systems when starting uphill).
Jerks at the beginning of the movement of the car
1. Violation of the fuel system and air intake system (see chapter «Supply system» and «Intake and exhaust system»).
2. Clutch failure (Manual Transmission) (see chapter «Clutch»). If the clutch slips during the start of the movement, this indicates excessive wear or a violation of the adjustments of the free and working travel of the clutch pedal. When the clutch slips, a characteristic smell of the friction materials of the clutch disc is possible (this smell can also appear with a good clutch if you hold the clutch pedal halfway down for a long time already during the start of the movement).
3. Violation of the installation of the valve timing (see above) (see chapter «Mechanical part of the engine»). In this case, it is possible to turn on the alarm «CHECK ENGINE».
4. Malfunction of cardan transmission in the target (see chapter «Drive shafts»), its increased wear (vehicles with a manual transmission and drive on both axles or only on the rear). Repairs should be carried out exclusively at the service station, while there may be no jerks, but at the moment the movement starts, a dull metallic knock will be heard (basically it's two strokes), then at every gear change.
5. Violation in the engine control system or in the transmission control system (vehicles with automatic transmission). In this case, it is possible to turn on the alarm «CHECK ENGINE» and/or a message will appear on the on-board computer screen (if the vehicle is equipped). You should immediately contact the service station.
6. Detonation in the engine cylinders (only petrol). The most common cause of detonation is low-quality fuel. In this case, a characteristic metallic knock will be heard from the engine. It is necessary to change the place of constant refueling of the car or switch to better fuel. Constant detonation is very harmful to the engine and can lead to breakage or violation of the geometric parameters of the connecting rod and piston group and the crankshaft, so you should not delay finding out the cause of this malfunction and eliminating it as soon as possible
However, it is worth considering the fact that during or at the beginning of the movement. when the throttle is suddenly opened for maximum acceleration, knocking may occur for 1-2 seconds, this is not a malfunction. In this case, the cause is a sharp change in the ignition timing (to an earlier) days of optimization of engine work processes and complete combustion of fuel.