This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and therefore not compensated for and can lean the engine out and can also allow the engine to rev up afterward not desired causing brusque running. As its a mechanical fault it tends not to viewpoint upon the malfunction lively and you can sometimes listen a hissing noise afterward the engine running.
Its with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a below par pump will all repercussion in insufficient fuel swine delivered to the engine. Might afterward be worth cleaning out the idle keenness direct motor / valve as these get clogged in the works later carbon and some brake cleaner washed through helps release things off.
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