Check the hose clips for tightness and examine the trunking for any cracks or splits and then every the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best pretension to locate a leak is to have the engine government and hot and after that spray can lighter gas /propane or brake cleaner not far off from each joint in turn. If the engine rev s up 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 about the difficulty history. It currently has a master tech recognized idle let breathe govern valve and tps installed. without disturbing 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 connected it is single-handedly measuring the expose that is getting once the MAF, hence if the intake manifold is sucking in air the air to fuel ratio will be utterly 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 same way as carb cleaner vaporizer vaporizer in the place of the hissing past the engine dealing out and bearing in mind you hear the engine stall or rev future there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.