Check the hose clips for tightness and inspect the trunking for any cracks or splits and along with all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best showing off to locate a leak is to have the engine presidency and warm and next spray can lighter gas /propane or brake cleaner in relation to 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 about the misery history. It currently has a master tech endorsed idle freshen direct 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. gone the MAF is plugged in then the car will stall unless I put my foot upon the accelerator. There is moreover an intermittent popping strong coming at idle.