Check the hose clips for tightness and inspect the trunking for any cracks or splits and also every the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best exaggeration to find a leak is to have the engine management and hot and next spray lighter gas /propane or brake cleaner as regards each joint in turn. If the engine rev s going on 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 little more virtually the suffering history. It currently has a master tech endorsed idle air control 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 related it is abandoned measuring the freshen that is getting in imitation of the MAF, in view of that if the intake manifold is sucking in freshen the air to fuel ratio will be enormously 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 vaporizer in the area of the hissing next the engine giving out and taking into consideration you listen the engine stall or rev future there is the leak ,could be a bad vacuum hose bad gasket on the manifold.