This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and therefore not compensated for and can lean the engine out and can as well as permit the engine to rev going on behind not desired causing aggressive running. As its a mechanical defect it tends not to perspective upon the anomaly spacious and you can sometimes listen a hissing noise once the engine running.
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 under the weather pump will every upshot in insufficient fuel instinctive delivered to the engine. Might with be worth cleaning out the idle rapidity govern motor / valve as these acquire clogged stirring past 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. taking into consideration the MAF is plugged in after that the car will stall unless I put my foot on the accelerator. There is then an intermittent popping hermetic coming at idle.