This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and hence not compensated for and can lean the engine out and can as a consequence allow the engine to rev up with not desired causing severe running. As its a mechanical irregularity it tends not to aim on the aberration roomy and you can sometimes hear a hissing noise as soon as the engine running.
Its plus 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 upshot in insufficient fuel monster delivered to the engine. Might along with be worth cleaning out the idle promptness control motor / valve as these acquire clogged going on subsequently carbon and some brake cleaner washed through helps pardon things off.
I don't have any check engine lights unless I unplug the MAF sensor. in imitation of the MAF is plugged in after that the car will stall unless I put my foot upon the accelerator. There is also an intermittent popping strong coming at idle.