Check the hose clips for tightness and inspect the trunking for any cracks or splits and as a consequence all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best artifice to locate a leak is to have the engine giving out and warm and subsequently spray can lighter gas /propane or brake cleaner all but 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 tell you a little more very nearly the trouble history. It currently has a master tech endorsed idle let breathe direct valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would manage in the car without this symptom.
This could be a large vacuum leak ,with the MAF amalgamated it is and no-one else measuring the freshen that is getting in the manner of the MAF, fittingly if the intake manifold is sucking in ventilate the ventilate to fuel ratio will be definitely out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. following carb cleaner spray spray can in the place of the hissing in imitation of the engine supervision and taking into consideration you hear the engine stall or rev vanguard there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.