Now you might think that spraying lighter gas approaching a hot engine isnt wise, however the flash /ignition narrowing of gas is practically 400C for that reason you compulsion a naked blaze or spark to set it off and Ive used this method for many years without incident. pretend your mannerism through each reachable joint one at a mature and you should locate it. I use a slightly flattened fragment of brake pipe and some rubber hose from the can of lighter gas to find the money for a spraying wand and allow a direct blast of gas into each area, especially those hard to attain once large implements.
Might furthermore be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can attain a fast deviation locate if you unplug the meter and control the engine without it. if the engine condition is the same next chances are the meter or the membership to it is faulty. Its after that worth cleaning the MAF sensor wires, as they can acquire coated once dirt higher than era which then offsets the reading. Use some right to use cleaner or brake cleaner to vaporizer onto the wires to separate the dirt on no account be adjacent to the wires following whatever as they are enormously fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place 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 stirring and is warmed up? oftentimes in engine comport yourself many factors may cause the thesame symptom(s)