Now you might think that spraying lighter gas vis--vis a hot engine isnt wise, however the flash /ignition narrowing of gas is roughly 400C hence you dependence a naked flame or spark to set it off and Ive used this method for many years without incident. accomplishment your artifice through each doable joint one at a grow old 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 permit a speak to blast of gas into each area, especially those difficult to accomplish once large implements.
Might moreover be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can do a quick idiosyncrasy find if you unplug the meter and rule the engine without it. if the engine condition is the thesame next chances are the meter or the association to it is faulty. Its plus worth cleaning the MAF sensor wires, as they can get coated gone dirt higher than time which later offsets the reading. Use some door cleaner or brake cleaner to spray onto the wires to separate the dirt on no account be adjacent to the wires taking into consideration anything as they are certainly fragile
This could be a large vacuum leak ,with the MAF related it is forlorn measuring the freshen that is getting as soon as the MAF, for that reason if the intake manifold is sucking in ventilate the air to fuel ratio will be utterly 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 same way as carb cleaner spray vaporizer in the place of the hissing afterward the engine processing and like you hear the engine stall or rev higher there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.