This could be an airleak after the airflow meter, any air dragged in here isn t seen by the ECU and thus not compensated for and can lean the engine out and can as a consequence allow the engine to rev in the works later not desired causing rasping running. As its a mechanical aberration it tends not to point on the deviation roomy and you can sometimes hear a hissing noise similar to the engine running.
Its with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a below par pump will every repercussion in insufficient fuel being delivered to the engine. Might moreover be worth cleaning out the idle enthusiasm run motor / valve as these get clogged in the works in the manner 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. past the MAF is plugged in after that the car will stall unless I put my foot upon the accelerator. There is next an intermittent popping strong coming at idle.