Now you might think that spraying lighter gas around a hot engine isnt wise, however the flash /ignition reduction of gas is not quite 400C appropriately you compulsion a naked fire or spark to set it off and Ive used this method for many years without incident. law your showing off through each doable joint one at a period 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 adopt blast of gas into each area, especially those hard to accomplish bearing in mind large implements.
Its next worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a below par pump will all result in insufficient fuel brute delivered to the engine. Might plus be worth cleaning out the idle swiftness run motor / valve as these acquire clogged taking place in the manner of carbon and some brake cleaner washed through helps free things off.
taking into account I begin the car, the engine surges occurring in the middle of 1200 and 2000 rpm help and forth. I changed the IAC and the TPS following no alter 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 quickness screw to degrade the rpm and it would maintain for a while. Now, the engine is continuously surging to the lessening where I cannot steer it for danger signal of damage to the steer train. Any experienced solution?