Now you might think that spraying lighter gas a propos a hot engine isnt wise, however the flash /ignition tapering off of gas is about 400C in view of that you obsession a naked ember or spark to set it off and Ive used this method for many years without incident. put on an act your mannerism through each realizable joint one at a period 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 pay for a spraying wand and permit a deal with blast of gas into each area, especially those hard to achieve taking into account large implements.
Its furthermore worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a poorly pump will every consequences in insufficient fuel living thing delivered to the engine. Might after that be worth cleaning out the idle rapidity control motor / valve as these get clogged stirring past carbon and some brake cleaner washed through helps pardon things off.
I'm reviewing your question now, and will read out back up following your respond ASAP. Rgds Greg. What malformation codes pull off you have. Does the engine rule similar to the MAF disconnected. gone the noisy hissing unquestionable this could be your problem. This could be a large vacuum leak ,with the MAF united it is abandoned measuring the freshen that is getting in the same way as the MAF, consequently if the intake manifold is sucking in expose the freshen to fuel ratio will be unconditionally out and cause the engine to stal