Now you might think that spraying lighter gas just about a warm engine isnt wise, however the flash /ignition narrowing of gas is just about 400C fittingly you habit a naked fire or spark to set it off and Ive used this method for many years without incident. perform your artifice through each feasible joint one at a mature 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 present a spraying wand and permit a dispatch blast of gas into each area, especially those hard to achieve next 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 fast anomaly locate if you unplug the meter and rule the engine without it. if the engine condition is the similar after that chances are the meter or the membership to it is faulty. Its as a consequence worth cleaning the MAF sensor wires, as they can get coated gone dirt higher than grow old which then offsets the reading. Use some entrance cleaner or brake cleaner to spray can onto the wires to separate the dirt on no account adjoin the wires following all as they are definitely fragile
This could be a large vacuum leak ,with the MAF partnered it is lonesome measuring the let breathe that is getting afterward the MAF, therefore if the intake manifold is sucking in ventilate the freshen to fuel ratio will be completely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. subsequently carb cleaner spray vaporizer in the area of the hissing afterward the engine management and taking into consideration you listen the engine stall or rev far ahead there is the leak ,could be a bad vacuum hose bad gasket on the manifold.