Check the hose clips for tightness and inspect the trunking for any cracks or splits and in addition to every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best artifice to find a leak is to have the engine meting out and warm and after that vaporizer lighter gas /propane or brake cleaner not far off from 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 tiny more nearly the trouble history. It currently has a master tech endorsed idle let breathe run 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 linked it is solitary measuring the air that is getting bearing in mind the MAF, appropriately if the intake manifold is sucking in expose the air to fuel ratio will be extremely 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 spray spray in the place of the hissing afterward the engine meting out and similar to you listen the engine stall or rev sophisticated there is the leak ,could be a bad vacuum hose bad gasket on the manifold.