Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public car that I am ready to steer off a cliff. had a idle surge hardship that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After frustrating 2-3 every second used IAC s, I took it to the master tech at lexus. He said it was the IAC valve. He tried my used ones.. and finally a rebuilt one. yet had issues. support to the dealer.. this period he says, it needs a ECU. I did a lot of research on them, and found that its a common difficulty when this car.. bought a used one.. more trouble. had the native one rebuilt by a specialist.. and that s where I am at now.. Put it in tonight and the car idles at 2k rpm. Does the TPS need to be re-adjusted? The master tech did every sorts of diagnostics on every related parts (tps, maf, iac). 0-200 every grow old I admit it reach the dealer for diagnostics.. upon going problems are in fact extra up. I m unsure to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its also worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a sick pump will all consequences in insufficient fuel creature delivered to the engine. Might next be worth cleaning out the idle zeal run motor / valve as these get clogged happening bearing in mind carbon and some brake cleaner washed through helps forgive things off.
Hello the TPS does have an effect upon switching the car into idle mode so I'd suggest to create definite the throttle dish is 100% closed and not slightly stranded considering carbon. and then acclimatize the TPS thus that the IDL pin is continuous to the E2 glue bearing in mind the throttle is closed, and admission circuit behind the throttle is just cracked. Don't distress not quite any voltages, the IDL admission is the truly important one.