Now you might think that spraying lighter gas a propos a warm engine isnt wise, however the flash /ignition tapering off of gas is very nearly 400C thus you infatuation a naked blaze or spark to set it off and Ive used this method for many years without incident. feign your pretension through each practicable joint one at a period 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 pay for a spraying wand and permit a focus on blast of gas into each area, especially those difficult to achieve subsequent to large implements.
Might then be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a fast irregularity find if you unplug the meter and manage the engine without it. if the engine condition is the same after that chances are the meter or the relationship to it is faulty. Its afterward worth cleaning the MAF sensor wires, as they can acquire coated next dirt over become old which subsequently offsets the reading. Use some entrance cleaner or brake cleaner to vaporizer onto the wires to remove the dirt upon no account touch the wires next whatever as they are extremely fragile
This could be a large vacuum leak ,with the MAF joined it is isolated measuring the freshen that is getting as soon as the MAF, correspondingly if the intake manifold is sucking in ventilate the expose to fuel ratio will be extremely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. later than carb cleaner vaporizer spray can in the area of the hissing similar to the engine executive and afterward you hear the engine stall or rev forward-thinking there is the leak ,could be a bad vacuum hose bad gasket on the manifold.