Now you might think that spraying lighter gas roughly speaking a hot engine isnt wise, however the flash /ignition point of gas is not quite 400C for that reason you craving a naked flare or spark to set it off and Ive used this method for many years without incident. con your artifice through each doable joint one at a era and you should locate it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to meet the expense of a spraying wand and allow a speak to blast of gas into each area, especially those hard to achieve behind large implements.
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 practically the problem history. It currently has a master tech endorsed idle expose control valve and tps installed. without distressing 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 upon 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 performance many factors may cause the similar symptom(s)