This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and hence not compensated for and can thin the engine out and can as a consequence allow the engine to rev happening taking into consideration not desired causing coarse running. As its a mechanical deformity it tends not to slope upon the oddity open and you can sometimes listen a hissing noise next the engine running.
Might as well as be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a fast malfunction locate if you unplug the meter and rule the engine without it. if the engine condition is the similar subsequently chances are the meter or the connection to it is faulty. Its furthermore worth cleaning the MAF sensor wires, as they can acquire coated past dirt over grow old which next offsets the reading. Use some approach cleaner or brake cleaner to spray can onto the wires to sever the dirt on no account touch the wires later than everything as they are very fragile
I don't have any check engine lights unless I unplug the MAF sensor. later the MAF is plugged in later the car will stall unless I put my foot on the accelerator. There is also an intermittent popping strong coming at idle.