Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast 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 aggravating 2-3 stand-in 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. still had issues. assist to the dealer.. this become old he says, it needs a ECU. I did a lot of research upon them, and found that its a common suffering in imitation of this car.. bought a used one.. more trouble. had the original 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 habit to be re-adjusted? The master tech did all sorts of diagnostics on every related parts (tps, maf, iac). $100-200 every times I bow to it attain the dealer for diagnostics.. on going problems are in fact toting up up. I m unsure to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
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Its next worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not at your best pump will all result in insufficient fuel instinctive delivered to the engine. Might as a consequence be worth cleaning out the idle rapidity rule motor / valve as these get clogged occurring later than carbon and some brake cleaner washed through helps free things off.
Hello the TPS does have an effect upon switching the car into idle mode consequently I'd suggest to make distinct the throttle plate is 100% closed and not slightly ashore past carbon. and subsequently familiarize the TPS so that the IDL stick is continuous to the E2 fasten similar to the throttle is closed, and right to use circuit considering the throttle is just cracked. Don't worry roughly any voltages, the IDL get into is the in fact important one.
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