Hello, I have repaired beyond 30000 vehicles in my career and I infatuation to ask you questions since I am not there in person to accrue facts, data, or to exam your vehicle. I may question you to perform study in my stead. If laboratory analysis is needed and you would rather not perform testing, I can present my best advice, Fuel pressure?
Might with be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a quick malformation find if you unplug the meter and direct the engine without it. if the engine condition is the similar next chances are the meter or the connection to it is faulty. Its moreover worth cleaning the MAF sensor wires, as they can get coated next dirt exceeding get older which after that offsets the reading. Use some retrieve cleaner or brake cleaner to spray can onto the wires to remove the dirt upon no account be adjacent to the wires later than anything as they are extremely fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you going on to date upon all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms taking place and is warmed up? oftentimes in engine fake many factors may cause the same symptom(s)