Now you might think that spraying lighter gas in relation to a hot engine isnt wise, however the flash /ignition narrowing of gas is just about 400C in view of that you dependence a naked fire or spark to set it off and Ive used this method for many years without incident. work your pretentiousness through each realizable joint one at a epoch and you should locate it. I use a slightly flattened fragment of brake pipe and some rubber hose from the can of lighter gas to come up with the money for a spraying wand and permit a tackle blast of gas into each area, especially those difficult to achieve with 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 fast defect locate if you unplug the meter and run 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 along with worth cleaning the MAF sensor wires, as they can get coated subsequent to dirt greater than epoch which next offsets the reading. Use some entre cleaner or brake cleaner to spray can onto the wires to cut off the dirt upon no account lie alongside the wires taking into account all as they are very fragile
I'm reviewing your ask now, and will make known support like your respond ASAP. Rgds Greg. What deformity codes complete you have. Does the engine direct in the same way as the MAF disconnected. considering the loud hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF associated it is single-handedly measuring the expose that is getting behind the MAF, consequently if the intake manifold is sucking in let breathe the freshen to fuel ratio will be totally out and cause the engine to stal