This could be an airleak after the airflow meter, any let breathe dragged in here isn t seen by the ECU and as a result not compensated for and can thin the engine out and can afterward permit the engine to rev going on similar to not desired causing severe running. As its a mechanical deviation it tends not to direction upon the malformation buoyant and you can sometimes hear a hissing noise subsequently the engine running.
Its moreover worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not at your best pump will all result in insufficient fuel brute delivered to the engine. Might along with be worth cleaning out the idle eagerness run motor / valve as these acquire clogged going on in imitation of carbon and some brake cleaner washed through helps clear things off.
I don't have any check engine lights unless I unplug the MAF sensor. when the MAF is plugged in after that the car will stall unless I put my foot upon the accelerator. There is along with an intermittent popping strong coming at idle.