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BMW Z4 engine runs unevenly after starting

Unsteady engine

I have a problem with my BMW Z4. About 30 seconds after starting the engine, the engine (2.2 l) starts to run out of round. Interestingly, this problem does not occur when I put the car into gear immediately after starting (automatic gearbox). Does anyone have any idea what the cause could be and how I can solve this problem?

(Translated from German)

1 comment(s)


CarlyMechanic

This issue could be due to a problem with the idle control valve. When you start the car and let it idle, the valve controls the idle speed. If it's faulty, it could cause the engine to run unevenly. However, when you put the car into gear immediately, the engine is under load and the idle control valve isn't as crucial. I'd suggest starting by cleaning the idle control valve and see if that helps. If the problem persists, you might need to replace it. Please update us on your progress. Do you have any other questions?

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