Check the hose clips for tightness and examine the trunking for any cracks or splits and furthermore all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best quirk to locate a leak is to have the engine dealing out and warm and later spray can lighter gas /propane or brake cleaner regarding each joint in turn. If the engine rev s occurring you ve found your leak.
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 nearly the pain history. It currently has a master tech endorsed idle freshen control valve and tps installed. without distressing anything, the last (used) ecu and my original, would rule in the car without this symptom.
This could be a large vacuum leak ,with the MAF united it is solitary measuring the let breathe that is getting later the MAF, therefore if the intake manifold is sucking in ventilate 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. when carb cleaner spray can spray in the area of the hissing past the engine giving out and subsequently you listen the engine stall or rev far along there is the leak ,could be a bad vacuum hose bad gasket on the manifold.