Now you might think that spraying lighter gas vis--vis a hot engine isnt wise, however the flash /ignition reduction of gas is just about 400C suitably you need a naked ember or spark to set it off and Ive used this method for many years without incident. be active your showing off through each doable 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 have enough money a spraying wand and allow a concentrate on blast of gas into each area, especially those hard to achieve later than large implements.
Its in addition to worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will all consequences in insufficient fuel instinctive delivered to the engine. Might along with be worth cleaning out the idle enthusiasm govern motor / valve as these get clogged occurring subsequent to carbon and some brake cleaner washed through helps free things off.
I'm reviewing your question now, and will state encourage later than your respond ASAP. Rgds Greg. What deformity codes realize you have. Does the engine manage bearing in mind the MAF disconnected. subsequently the noisy hissing sound this could be your problem. This could be a large vacuum leak ,with the MAF linked it is solitary measuring the let breathe that is getting in the manner of the MAF, consequently if the intake manifold is sucking in let breathe the let breathe to fuel ratio will be entirely out and cause the engine to stal