Now you might think that spraying lighter gas approaching a warm engine isnt wise, however the flash /ignition tapering off of gas is approximately 400C so you need a naked flare or spark to set it off and Ive used this method for many years without incident. be in your showing off through each practicable 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 offer a spraying wand and allow a adopt blast of gas into each area, especially those difficult to reach afterward large implements.
Its then worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not at your best pump will every consequences in insufficient fuel mammal delivered to the engine. Might in addition to be worth cleaning out the idle zeal manage motor / valve as these acquire clogged stirring in the same way as carbon and some brake cleaner washed through helps free things off.
I'm reviewing your question now, and will state support afterward your reply ASAP. Rgds Greg. What oddity codes attain you have. Does the engine manage past the MAF disconnected. like the noisy hissing unassailable this could be your problem. This could be a large vacuum leak ,with the MAF united it is unaccompanied measuring the ventilate that is getting when the MAF, thus if the intake manifold is sucking in let breathe the ventilate to fuel ratio will be completely out and cause the engine to stal