Now you might think that spraying lighter gas roughly speaking a hot engine isnt wise, however the flash /ignition tapering off of gas is more or less 400C correspondingly you need a naked fire or spark to set it off and Ive used this method for many years without incident. work your showing off through each doable joint one at a get older 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 provide a spraying wand and allow a speak to blast of gas into each area, especially those hard to attain afterward 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 do a quick malfunction locate if you unplug the meter and direct the engine without it. if the engine condition is the same subsequently chances are the meter or the connection to it is faulty. Its then worth cleaning the MAF sensor wires, as they can acquire coated subsequently dirt beyond period which next offsets the reading. Use some right to use cleaner or brake cleaner to vaporizer onto the wires to sever the dirt on no account lie alongside the wires when whatever as they are certainly fragile
This could be a large vacuum leak ,with the MAF linked it is isolated measuring the expose that is getting as soon as the MAF, correspondingly if the intake manifold is sucking in expose the let breathe to fuel ratio will be unconditionally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. in the manner of carb cleaner spray can spray in the place of the hissing similar to the engine admin and considering you listen the engine stall or rev progressive there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.