This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and for that reason not compensated for and can lean the engine out and can plus allow the engine to rev stirring next not desired causing uncompromising running. As its a mechanical defect it tends not to aim upon the oddity lively and you can sometimes hear a hissing noise in the same way as the engine running.
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Its along with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a in poor health pump will all upshot in insufficient fuel subconscious delivered to the engine. Might plus be worth cleaning out the idle speed control motor / valve as these get clogged occurring when carbon and some brake cleaner washed through helps release things off.
I don't have any check engine lights unless I unplug the MAF sensor. taking into account the MAF is plugged in next the car will stall unless I put my foot on the accelerator. There is as a consequence an intermittent popping sound coming at idle.
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