This could be an airleak after the airflow meter, any freshen dragged in here isn t seen by the ECU and thus not compensated for and can thin the engine out and can with allow the engine to rev up later than not desired causing gruff running. As its a mechanical malformation it tends not to position on the aberration roomy and you can sometimes listen a hissing noise similar to the engine running.
Might then be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a fast oddity locate if you unplug the meter and direct the engine without it. if the engine condition is the thesame next chances are the meter or the membership to it is faulty. Its plus worth cleaning the MAF sensor wires, as they can get coated as soon as dirt over time which later offsets the reading. Use some approach cleaner or brake cleaner to vaporizer onto the wires to separate the dirt on no account lie alongside the wires taking into consideration everything as they are completely fragile
I don't have any check engine lights unless I unplug the MAF sensor. like the MAF is plugged in after that the car will stall unless I put my foot on the accelerator. There is plus an intermittent popping hermetic coming at idle.