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Engine runs rough - unsteady engine running

This problem occurs mostly in engines with electronically controlled injection systems. Irregular / restless engine running can arise for various reasons.


Likely reasons/recommendations

  1. In the event of incorrect operation of the idle speed controller, the air mass meter or the throttle valve potentiometer

    the subgroups mentioned above must be replaced.

  2. If air is sucked into the system.
  3. In the event of a malfunction in the fuel system:

    For clogged / contaminated injectors / injection nozzles where deposits have already formed. In this case we recommend the XADO Multi Cleaner - injectors and fuel system cleaner to use.

  4. In the event of a malfunction in the ignition system.

    Is a candle, ignition cable, ignition coil diagnosis is necessary.

  5. When the engine electronic control unit malfunctions.

    The ECU cannot process the correct signal for the normal operation of the injectors / injectors. A professional diagnosis in a workshop is necessary.

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