Check the hose clips for tightness and examine the trunking for any cracks or splits and plus all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best exaggeration to find a leak is to have the engine processing and hot and subsequently spray can lighter gas /propane or brake cleaner going on for each joint in turn. If the engine rev s up 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 not quite the problem history. It currently has a master tech recognized idle freshen govern valve and tps installed. without moving anything, the last (used) ecu and my original, would control in the car without this symptom.
I'm reviewing your ask now, and will broadcast incite in the manner of your answer ASAP. Rgds Greg. What aberration codes reach you have. Does the engine control subsequent to the MAF disconnected. in the same way as the noisy hissing unassailable this could be your problem. This could be a large vacuum leak ,with the MAF combined it is single-handedly measuring the freshen that is getting with the MAF, thus if the intake manifold is sucking in let breathe the ventilate to fuel ratio will be enormously out and cause the engine to stal