This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and thus not compensated for and can thin the engine out and can moreover allow the engine to rev taking place in imitation of not desired causing unfriendly running. As its a mechanical anomaly it tends not to position on the deviation buoyant and you can sometimes hear a hissing noise like the engine running.
Might along with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can get a fast fault find if you unplug the meter and govern the engine without it. if the engine condition is the same then chances are the meter or the link to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can acquire coated once dirt more than become old which next offsets the reading. Use some entry cleaner or brake cleaner to vaporizer onto the wires to sever the dirt upon no account touch the wires afterward everything as they are definitely fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you stirring to date upon every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms stirring and is warmed up? oftentimes in engine be in many factors may cause the similar symptom(s)