Now you might think that spraying lighter gas in relation to a warm engine isnt wise, however the flash /ignition dwindling of gas is about 400C so you compulsion a naked flame or spark to set it off and Ive used this method for many years without incident. take steps your quirk through each feasible 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 find the money for a spraying wand and permit a focus on blast of gas into each area, especially those difficult to accomplish as soon as 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 little more virtually the hardship history. It currently has a master tech qualified idle let breathe control valve and tps installed. without upsetting anything, the last (used) ecu and my original, would manage in the car without this symptom.
afterward I start the car, the engine surges happening between 1200 and 2000 rpm back and forth. I misrepresented the IAC and the TPS subsequent to no bend in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to accustom yourself the idle swiftness screw to lower the rpm and it would keep for a while. Now, the engine is each time surging to the dwindling where I cannot steer it for frighten of broken to the drive train. Any experienced solution?