Now you might think that spraying lighter gas going on for a hot engine isnt wise, however the flash /ignition tapering off of gas is about 400C therefore you compulsion a naked flame or spark to set it off and Ive used this method for many years without incident. produce a result your way through each feasible joint one at a period and you should find it. I use a slightly flattened fragment of brake pipe and some rubber hose from the can of lighter gas to pay for a spraying wand and allow a attend to blast of gas into each area, especially those hard to reach in imitation of large implements.
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me tell you a tiny more practically the problem history. It currently has a master tech attributed idle let breathe govern valve and tps installed. without touching anything, the last (used) ecu and my original, would rule in the car without this symptom.
like I start the car, the engine surges happening along with 1200 and 2000 rpm incite and forth. I changed the IAC and the TPS afterward no amend in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to accustom yourself the idle promptness screw to humiliate the rpm and it would support for a while. Now, the engine is permanently surging to the narrowing where I cannot steer it for panic of broken to the steer train. Any experienced solution?