This could be an airleak after the airflow meter, any ventilate dragged in here isn t seen by the ECU and in view of that not compensated for and can lean the engine out and can in addition to allow the engine to rev in the works bearing in mind not desired causing aggressive running. As its a mechanical irregularity it tends not to aim on the malfunction well-ventilated and you can sometimes listen a hissing noise similar to the engine running.
Might with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can reach a quick oddity locate if you unplug the meter and direct the engine without it. if the engine condition is the same subsequently chances are the meter or the association to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can acquire coated subsequent to dirt higher than get older which after that offsets the reading. Use some entre cleaner or brake cleaner to vaporizer onto the wires to surgically remove the dirt on no account be adjacent to the wires with all as they are completely fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you up to date on every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms going on and is warmed up? oftentimes in engine take action many factors may cause the thesame symptom(s)