Hello, I have repaired higher than 30000 vehicles in my career and I obsession to question you questions in the past I am not there in person to gather together facts, data, or to test your vehicle. I may question you to produce an effect study in my stead. If psychiatry is needed and you would rather not behave testing, I can pay for my best advice, Fuel pressure?
Might after that be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can reach a fast defect locate if you unplug the meter and direct the engine without it. if the engine condition is the thesame next chances are the meter or the link to it is faulty. Its as a consequence worth cleaning the MAF sensor wires, as they can acquire coated bearing in mind dirt beyond get older which subsequently offsets the reading. Use some contact cleaner or brake cleaner to spray can onto the wires to sever the dirt upon no account be adjacent to the wires in the manner of whatever as they are certainly fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you in the works 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 happening and is warmed up? oftentimes in engine deed many factors may cause the thesame symptom(s)