Hello, I have repaired greater than 30000 vehicles in my career and I obsession to ask you questions past I am not there in person to gather together facts, data, or to exam your vehicle. I may question you to pretense psychoanalysis in my stead. If laboratory analysis is needed and you would rather not take action testing, I can give my best advice, Fuel pressure?
Might furthermore be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a fast oddity find if you unplug the meter and run the engine without it. if the engine condition is the thesame then chances are the meter or the connection to it is faulty. Its next worth cleaning the MAF sensor wires, as they can get coated behind dirt over time which subsequently offsets the reading. Use some entry cleaner or brake cleaner to spray onto the wires to sever the dirt upon no account lie alongside the wires gone anything as they are entirely fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you up 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 take effect many factors may cause the similar symptom(s)