Now you might think that spraying lighter gas nearly a warm engine isnt wise, however the flash /ignition point of gas is about 400C as a result you obsession a naked flare or spark to set it off and Ive used this method for many years without incident. operate your quirk through each possible joint one at a time and you should find it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to come up with the money for a spraying wand and permit a dispatch blast of gas into each area, especially those difficult to attain afterward 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 roughly the problem history. It currently has a master tech certified idle expose govern valve and tps installed. without moving anything, the last (used) ecu and my original, would run in the car without this symptom.
when I start the car, the engine surges stirring amid 1200 and 2000 rpm assist and forth. I misrepresented the IAC and the TPS subsequent to no alter in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to familiarize the idle promptness screw to demean the rpm and it would maintain for a while. Now, the engine is permanently surging to the dwindling where I cannot drive it for danger signal of damage to the drive train. Any experienced solution?