Hello, I have repaired higher than 30000 vehicles in my career and I habit to question you questions back I am not there in person to pile up facts, data, or to exam your vehicle. I may ask you to exploit testing in my stead. If psychiatry is needed and you would rather not take action testing, I can manage to pay for my best advice, Fuel pressure?
Might plus be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a fast oddity locate if you unplug the meter and rule the engine without it. if the engine condition is the same then chances are the meter or the membership to it is faulty. Its then worth cleaning the MAF sensor wires, as they can acquire coated later dirt higher than times which after that offsets the reading. Use some retrieve cleaner or brake cleaner to spray onto the wires to separate the dirt on no account be next to the wires later all as they are totally fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place 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 occurring and is warmed up? oftentimes in engine play many factors may cause the similar symptom(s)