This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and for that reason not compensated for and can lean the engine out and can next allow the engine to rev occurring past not desired causing uncompromising running. As its a mechanical defect it tends not to incline upon the aberration light and you can sometimes listen a hissing noise later the engine running.
Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can get a fast anomaly find if you unplug the meter and direct the engine without it. if the engine condition is the thesame later chances are the meter or the relationship to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can get coated taking into consideration dirt beyond era which then offsets the reading. Use some get into cleaner or brake cleaner to vaporizer onto the wires to cut off the dirt on no account touch the wires bearing in mind everything as they are certainly fragile
I don't have any check engine lights unless I unplug the MAF sensor. afterward the MAF is plugged in later the car will stall unless I put my foot upon the accelerator. There is next an intermittent popping hermetic coming at idle.