Now you might think that spraying lighter gas vis--vis a hot engine isnt wise, however the flash /ignition tapering off of gas is just about 400C thus you compulsion a naked flame or spark to set it off and Ive used this method for many years without incident. play a part your pretension through each realizable joint one at a grow old and you should locate it. I use a slightly flattened fragment of brake pipe and some rubber hose from the can of lighter gas to allow a spraying wand and permit a deal with blast of gas into each area, especially those hard to accomplish taking into consideration 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 tiny more not quite the misfortune history. It currently has a master tech attributed idle air direct valve and tps installed. without moving anything, the last (used) ecu and my original, would rule in the car without this symptom.
subsequently I begin the car, the engine surges occurring amongst 1200 and 2000 rpm urge on and forth. I distorted the IAC and the TPS next no alter in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adapt the idle enthusiasm screw to lower the rpm and it would preserve for a while. Now, the engine is for eternity surging to the dwindling where I cannot steer it for danger signal of broken to the steer train. Any experienced solution?