Jerks in steady movement

These jerks are most often caused by a malfunction of the ignition system. Diagnostics and repair needed (see. Sec. 10 "Electrical"). On the way you can try yourself the following:

- Carefully inspect the engine compartment. Switch off the ignition and check the reliability of fastening and landing all wires and connectors from the ignition coil and high-voltage wires. Let the engine and listen to his work - the crackle of the breakdown of high voltage "on weight" faint but distinct. In complete darkness can be clearly seen in the breakdown of a spark;

- Replace the spark plugs irrespective of their condition and mileage. Pay attention to the condition of the spark, if it is abnormal, you may have to repair the engine or its systems.

The specific cause jerks during steady driving with fuel-injected engine may be the failure of the throttle position sensor (pictured throttle assembly removed for clarity). Additional symptoms, confirming the fault of the sensor are:

- Irregular operation of the engine at idle;

- Reducing the maximum power of the engine.

Sensor molded and therefore non repairable. If found defective sensor (see. "Replacing sensor engine management system"), it is replaced in gathering.