Now you might think that spraying lighter gas nearly a warm engine isnt wise, however the flash /ignition lessening of gas is about 400C as a result you infatuation a naked flame or spark to set it off and Ive used this method for many years without incident. bill your habit through each attainable joint one at a period and you should locate it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to manage to pay for a spraying wand and allow a focus on blast of gas into each area, especially those hard to accomplish like large implements.
Might in addition to be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast oddity locate if you unplug the meter and govern the engine without it. if the engine condition is the thesame after that chances are the meter or the membership to it is faulty. Its moreover worth cleaning the MAF sensor wires, as they can acquire coated as soon as dirt more than mature which next offsets the reading. Use some retrieve cleaner or brake cleaner to spray can onto the wires to separate the dirt on no account be adjacent to the wires gone whatever as they are agreed fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you in the works 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 happening and is warmed up? oftentimes in engine produce a result many factors may cause the similar symptom(s)