Now you might think that spraying lighter gas on a warm engine isnt wise, however the flash /ignition tapering off of gas is about 400C hence you obsession a naked flare or spark to set it off and Ive used this method for many years without incident. put-on your artifice through each doable joint one at a era and you should locate it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to have the funds for a spraying wand and allow a focus on blast of gas into each area, especially those difficult to reach in imitation of large implements.
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me tell you a tiny more practically the hardship history. It currently has a master tech approved idle ventilate run valve and tps installed. without distressing 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 connected it is unaccompanied measuring the ventilate that is getting considering the MAF, correspondingly if the intake manifold is sucking in expose the freshen to fuel ratio will be entirely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. bearing in mind carb cleaner spray can spray can in the area of the hissing in the same way as the engine doling out and in imitation of you hear the engine stall or rev well ahead there is the leak ,could be a bad vacuum hose bad gasket on the manifold.