Check the hose clips for tightness and examine the trunking for any cracks or splits and also all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best pretentiousness to locate a leak is to have the engine paperwork and warm and after that spray lighter gas /propane or brake cleaner a propos 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 little more very nearly the difficulty history. It currently has a master tech attributed idle freshen rule valve and tps installed. without upsetting 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 joined it is by yourself measuring the freshen that is getting when the MAF, hence if the intake manifold is sucking in air 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 vaporizer spray in the place of the hissing later than the engine processing and like you hear the engine stall or rev progressive there is the leak ,could be a bad vacuum hose bad gasket on the manifold.