Now you might think that spraying lighter gas re a hot engine isnt wise, however the flash /ignition narrowing of gas is virtually 400C hence you need a naked fire or spark to set it off and Ive used this method for many years without incident. performance your pretension through each realistic joint one at a grow old 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 allow a spraying wand and permit a talk to blast of gas into each area, especially those difficult to accomplish afterward large implements.
Might also be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can complete a quick irregularity find if you unplug the meter and rule the engine without it. if the engine condition is the thesame then chances are the meter or the association to it is faulty. Its moreover worth cleaning the MAF sensor wires, as they can acquire coated bearing in mind dirt beyond become old which later offsets the reading. Use some right of entry cleaner or brake cleaner to vaporizer onto the wires to separate the dirt upon no account adjoin the wires afterward everything as they are completely fragile
This could be a large vacuum leak ,with the MAF united it is forlorn measuring the air that is getting similar to the MAF, so if the intake manifold is sucking in expose the air to fuel ratio will be entirely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. taking into account carb cleaner vaporizer vaporizer in the place of the hissing following the engine meting out and past you hear the engine stall or rev far along there is the leak ,could be a bad vacuum hose bad gasket on the manifold.