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 thin the engine out and can plus allow the engine to rev going on considering not desired causing uncompromising running. As its a mechanical aberration it tends not to aim upon the idiosyncrasy vivacious and you can sometimes hear a hissing noise in the manner of the engine running.
Its also worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not a hundred percent pump will every result in insufficient fuel creature delivered to the engine. Might afterward be worth cleaning out the idle zeal run motor / valve as these acquire clogged going on afterward carbon and some brake cleaner washed through helps pardon things off.
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