Check the hose clips for tightness and inspect the trunking for any cracks or splits and in addition to all the vacuum system, the little bore pipes and fittings for cracks and missing parts. The best showing off to find a leak is to have the engine government and warm and subsequently vaporizer lighter gas /propane or brake cleaner almost each joint in turn. If the engine rev s taking place 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 not quite the problem history. It currently has a master tech certified idle let breathe direct valve and tps installed. without upsetting anything, the last (used) ecu and my original, would control in the car without this symptom.
I don't have any check engine lights unless I unplug the MAF sensor. subsequent to the MAF is plugged in later the car will stall unless I put my foot upon the accelerator. There is after that an intermittent popping strong coming at idle.