Now you might think that spraying lighter gas something like a warm engine isnt wise, however the flash /ignition narrowing of gas is more or less 400C appropriately you craving a naked flare or spark to set it off and Ive used this method for many years without incident. take action your artifice through each doable joint one at a period 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 give a spraying wand and permit a talk to blast of gas into each area, especially those difficult to attain in the same way as large implements.
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a tiny more very nearly the problem history. It currently has a master tech credited idle air rule valve and tps installed. without disturbing anything, the last (used) ecu and my original, would run in the car without this symptom.
This could be a large vacuum leak ,with the MAF joined it is and no-one else measuring the expose that is getting afterward the MAF, fittingly if the intake manifold is sucking in expose the let breathe to fuel ratio will be unquestionably out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. past carb cleaner spray spray can in the place of the hissing taking into consideration the engine dealing out and gone you hear the engine stall or rev higher there is the leak ,could be a bad vacuum hose bad gasket on the manifold.