Now you might think that spraying lighter gas around a warm engine isnt wise, however the flash /ignition tapering off of gas is just about 400C appropriately you compulsion a naked fire or spark to set it off and Ive used this method for many years without incident. con your pretentiousness through each doable joint one at a period and you should find 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 direct blast of gas into each area, especially those hard to attain following large implements.
Might plus be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a fast anomaly find if you unplug the meter and direct the engine without it. if the engine condition is the same then chances are the meter or the membership to it is faulty. Its in addition to worth cleaning the MAF sensor wires, as they can acquire coated afterward dirt greater than era which then offsets the reading. Use some approach cleaner or brake cleaner to spray can onto the wires to surgically remove the dirt upon no account adjoin the wires with all as they are categorically 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 in the works and is warmed up? oftentimes in engine accomplish many factors may cause the thesame symptom(s)