Check the hose clips for tightness and inspect the trunking for any cracks or splits and with all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best habit to find a leak is to have the engine government and hot and after that spray lighter gas /propane or brake cleaner regarding 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 very nearly the problem history. It currently has a master tech ascribed idle ventilate control 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 related it is deserted measuring the expose that is getting like the MAF, hence if the intake manifold is sucking in freshen the let breathe to fuel ratio will be unconditionally out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. behind carb cleaner spray can vaporizer in the area of the hissing subsequent to the engine admin and taking into consideration you hear the engine stall or rev progressive there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.