Hello, I have repaired exceeding 30000 vehicles in my career and I need to ask you questions back I am not there in person to hoard facts, data, or to test your vehicle. I may question you to feint psychiatry in my stead. If laboratory analysis is needed and you would rather not appear in testing, I can have enough money 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 quick irregularity locate if you unplug the meter and run the engine without it. if the engine condition is the thesame subsequently chances are the meter or the attachment to it is faulty. Its furthermore worth cleaning the MAF sensor wires, as they can acquire coated taking into account dirt more than period which next offsets the reading. Use some door cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt on no account adjoin the wires subsequently everything as they are completely fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you going on to date on all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms in the works and is warmed up? oftentimes in engine piece of legislation many factors may cause the similar symptom(s)