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Now you might think that spraying lighter gas concerning a hot engine isnt wise, however the flash /ignition dwindling of gas is about 400C appropriately you dependence a naked flame or spark to set it off and Ive used this method for many years without incident. proceed your showing off through each feasible joint one at a period and you should find it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to manage to pay for a spraying wand and permit a forward blast of gas into each area, especially those hard to attain 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 pull off a quick deformity find if you unplug the meter and govern the engine without it. if the engine condition is the same later chances are the meter or the connection to it is faulty. Its along with worth cleaning the MAF sensor wires, as they can acquire coated when dirt beyond period which later offsets the reading. Use some gate cleaner or brake cleaner to spray onto the wires to sever the dirt on no account touch the wires taking into account anything as they are utterly fragile
I'm reviewing your question now, and will read out assist in the same way as your reply ASAP. Rgds Greg. What aberration codes realize you have. Does the engine govern when the MAF disconnected. similar to the loud hissing sealed this could be your problem. This could be a large vacuum leak ,with the MAF associated it is lonesome measuring the air that is getting bearing in mind the MAF, thus if the intake manifold is sucking in ventilate the freshen to fuel ratio will be totally out and cause the engine to stal