Check the hose clips for tightness and examine the trunking for any cracks or splits and plus all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best mannerism to locate a leak is to have the engine government and warm and later spray lighter gas /propane or brake cleaner all but each joint in turn. If the engine rev s taking place 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 about the suffering history. It currently has a master tech qualified idle let breathe rule valve and tps installed. without touching anything, the last (used) ecu and my original, would control in the car without this symptom.
This could be a large vacuum leak ,with the MAF related it is lonesome measuring the expose that is getting like the MAF, in view of that if the intake manifold is sucking in expose the air to fuel ratio will be certainly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. in the manner of carb cleaner spray spray can in the area of the hissing with the engine presidency and following you hear the engine stall or rev unconventional there is the leak ,could be a bad vacuum hose bad gasket on the manifold.