Hello, I have repaired greater than 30000 vehicles in my career and I habit to question you questions back I am not there in person to hoard facts, data, or to exam your vehicle. I may question you to play study in my stead. If examination is needed and you would rather not act out testing, I can find the money 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 quick fault locate if you unplug the meter and control the engine without it. if the engine condition is the similar subsequently chances are the meter or the membership to it is faulty. Its along with worth cleaning the MAF sensor wires, as they can get coated taking into consideration dirt beyond get older which then offsets the reading. Use some right to use cleaner or brake cleaner to vaporizer onto the wires to sever the dirt on no account lie alongside the wires considering whatever as they are agreed fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you occurring 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 up and is warmed up? oftentimes in engine piece of legislation many factors may cause the thesame symptom(s)