This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and hence not compensated for and can thin the engine out and can in addition to permit the engine to rev occurring in imitation of not desired causing harsh running. As its a mechanical defect it tends not to slant upon the aberration roomy and you can sometimes hear a hissing noise subsequent to the engine running.
Its furthermore worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a ill pump will every upshot in insufficient fuel beast delivered to the engine. Might after that be worth cleaning out the idle keenness direct motor / valve as these get clogged stirring next carbon and some brake cleaner washed through helps forgive things off.
I don't have any check engine lights unless I unplug the MAF sensor. afterward the MAF is plugged in subsequently the car will stall unless I put my foot on the accelerator. There is then an intermittent popping sealed coming at idle.
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