Check the hose clips for tightness and inspect the trunking for any cracks or splits and as well as all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best exaggeration to find a leak is to have the engine doling out and warm and then spray can lighter gas /propane or brake cleaner with reference 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 say you a little more very nearly the difficulty history. It currently has a master tech recognized idle ventilate run valve and tps installed. without disturbing anything, the last (used) ecu and my original, would govern in the car without this symptom.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you going on to date on all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms occurring and is warmed up? oftentimes in engine play a part many factors may cause the same symptom(s)