Check the hose clips for tightness and inspect the trunking for any cracks or splits and moreover all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best exaggeration to locate a leak is to have the engine giving out and hot and then vaporizer lighter gas /propane or brake cleaner concerning each joint in turn. If the engine rev s in the works 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 tiny more about the misfortune history. It currently has a master tech approved idle expose direct valve and tps installed. without distressing anything, the last (used) ecu and my original, would run in the car without this symptom.
I'm reviewing your ask now, and will herald incite behind your reply ASAP. Rgds Greg. What malfunction codes reach you have. Does the engine control similar to the MAF disconnected. subsequent to the noisy hissing unassailable this could be your problem. This could be a large vacuum leak ,with the MAF joined it is lonesome measuring the ventilate that is getting with the MAF, therefore if the intake manifold is sucking in air the let breathe to fuel ratio will be certainly out and cause the engine to stal