Check the hose clips for tightness and inspect the trunking for any cracks or splits and next every the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best pretension to find a leak is to have the engine organization and warm and after that spray can lighter gas /propane or brake cleaner going on for each joint in turn. If the engine rev s happening 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 not quite the hardship history. It currently has a master tech approved idle expose rule valve and tps installed. without distressing anything, the last (used) ecu and my original, would run in the car without this symptom.
I don't have any check engine lights unless I unplug the MAF sensor. as soon as the MAF is plugged in then the car will stall unless I put my foot upon the accelerator. There is in addition to an intermittent popping hermetic coming at idle.