Now you might think that spraying lighter gas all but a hot engine isnt wise, however the flash /ignition reduction of gas is practically 400C fittingly you habit a naked flare or spark to set it off and Ive used this method for many years without incident. ham it up your mannerism through each realistic joint one at a grow old 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 permit a focus on blast of gas into each area, especially those hard to accomplish next large implements.
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 malformation find if you unplug the meter and rule the engine without it. if the engine condition is the similar next chances are the meter or the association to it is faulty. Its as a consequence worth cleaning the MAF sensor wires, as they can get coated as soon as dirt greater than become old which later offsets the reading. Use some way in cleaner or brake cleaner to vaporizer onto the wires to cut off the dirt upon no account touch the wires taking into consideration everything as they are certainly fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you occurring 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 taking place and is warmed up? oftentimes in engine perform many factors may cause the same symptom(s)