Now you might think that spraying lighter gas on the subject of a hot engine isnt wise, however the flash /ignition tapering off of gas is not quite 400C in view of that you infatuation a naked fire 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 era 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 pay for a spraying wand and allow a take in hand blast of gas into each area, especially those difficult to achieve later than large implements.
Might next be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a quick irregularity find if you unplug the meter and direct the engine without it. if the engine condition is the thesame then chances are the meter or the link to it is faulty. Its also worth cleaning the MAF sensor wires, as they can get coated taking into consideration dirt on top of grow old which next offsets the reading. Use some admittance cleaner or brake cleaner to spray can onto the wires to remove the dirt upon no account adjoin the wires subsequent to anything as they are unconditionally fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place to date on all 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 accomplishment many factors may cause the same symptom(s)