Now you might think that spraying lighter gas almost a warm engine isnt wise, however the flash /ignition narrowing of gas is very nearly 400C suitably you habit a naked flame or spark to set it off and Ive used this method for many years without incident. proceed your showing off through each practicable joint one at a era and you should find 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 take in hand blast of gas into each area, especially those hard to accomplish in the same way as 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 reach a quick aberration locate if you unplug the meter and control the engine without it. if the engine condition is the thesame then chances are the meter or the attachment to it is faulty. Its after that worth cleaning the MAF sensor wires, as they can acquire coated in the manner of dirt higher than era which later offsets the reading. Use some log on cleaner or brake cleaner to vaporizer onto the wires to separate the dirt upon no account be next to the wires subsequently all as they are no question fragile
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you stirring to date upon every maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms going on and is warmed up? oftentimes in engine do its stuff many factors may cause the similar symptom(s)