Hello, I have repaired over 30000 vehicles in my career and I infatuation to ask you questions in the past I am not there in person to accrue facts, data, or to exam your vehicle. I may question you to produce a result laboratory analysis in my stead. If assay is needed and you would rather not take steps testing, I can give my best advice, Fuel pressure?
Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can reach a fast irregularity find if you unplug the meter and direct the engine without it. if the engine condition is the thesame later chances are the meter or the relationship to it is faulty. Its as a consequence worth cleaning the MAF sensor wires, as they can acquire coated subsequent to dirt higher than epoch which subsequently offsets the reading. Use some admittance cleaner or brake cleaner to spray onto the wires to sever the dirt upon no account be adjacent to the wires later whatever 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 all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms going on and is warmed up? oftentimes in engine acquit yourself many factors may cause the similar symptom(s)