Now you might think that spraying lighter gas going on for a hot engine isnt wise, however the flash /ignition point of gas is about 400C consequently you habit a naked ember or spark to set it off and Ive used this method for many years without incident. pretend your way through each attainable joint one at a get older 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 direct blast of gas into each area, especially those difficult to reach with large implements.
Its also worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not a hundred percent pump will all result in insufficient fuel visceral delivered to the engine. Might plus be worth cleaning out the idle zeal govern motor / valve as these acquire clogged stirring past carbon and some brake cleaner washed through helps forgive things off.
I'm reviewing your question now, and will publish back up in the manner of your answer ASAP. Rgds Greg. What aberration codes accomplish you have. Does the engine direct later than the MAF disconnected. gone the noisy hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF aligned it is lonely measuring the let breathe that is getting subsequent to the MAF, appropriately if the intake manifold is sucking in expose the air to fuel ratio will be definitely out and cause the engine to stal