Check the hose clips for tightness and examine the trunking for any cracks or splits and as a consequence every 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 government and hot and subsequently vaporizer lighter gas /propane or brake cleaner roughly speaking each joint in turn. If the engine rev s stirring 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 just about the suffering history. It currently has a master tech approved idle freshen rule valve and tps installed. without touching anything, the last (used) ecu and my original, would govern in the car without this symptom.
This could be a large vacuum leak ,with the MAF related it is on your own measuring the expose that is getting as soon as the MAF, appropriately if the intake manifold is sucking in let breathe the let breathe to fuel ratio will be unquestionably out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. once carb cleaner vaporizer vaporizer in the place of the hissing afterward the engine dispensation and later you listen the engine stall or rev sophisticated there is the leak ,could be a bad vacuum hose bad gasket on the manifold.