Now you might think that spraying lighter gas more or less a hot engine isnt wise, however the flash /ignition reduction of gas is virtually 400C suitably you obsession a naked flare or spark to set it off and Ive used this method for many years without incident. do its stuff your way through each reachable joint one at a mature 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 give a spraying wand and permit a talk to blast of gas into each area, especially those hard to achieve with large implements.
Its after that worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a in poor health pump will all repercussion in insufficient fuel visceral delivered to the engine. Might also be worth cleaning out the idle zeal manage motor / valve as these get clogged in the works in the manner of carbon and some brake cleaner washed through helps clear things off.
subsequently I start the car, the engine surges up amongst 1200 and 2000 rpm back and forth. I distorted the IAC and the TPS once no tweak in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to familiarize the idle zeal screw to humiliate the rpm and it would maintain for a while. Now, the engine is all the time surging to the lessening where I cannot drive it for frighten of damage to the drive train. Any experienced solution?