Now you might think that spraying lighter gas nearly a warm engine isnt wise, however the flash /ignition point of gas is practically 400C in view of that you obsession a naked fire or spark to set it off and Ive used this method for many years without incident. take steps your pretentiousness through each viable joint one at a time 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 have the funds for a spraying wand and permit a forward blast of gas into each area, especially those hard to reach taking into consideration large implements.
Might as a consequence be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can pull off a quick deformity locate if you unplug the meter and control the engine without it. if the engine condition is the same then chances are the meter or the membership to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can get coated in the same way as dirt higher than become old which next offsets the reading. Use some entre cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt upon no account adjoin the wires taking into consideration all as they are definitely fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you taking place to date on every 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 undertaking many factors may cause the same symptom(s)