Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super announce car that I am ready to drive 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 different 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. incite to the dealer.. this time he says, it needs a ECU. I did a lot of research on them, and found that its a common trouble in imitation of this car.. bought a used one.. more trouble. had the indigenous 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics on all connected parts (tps, maf, iac). $100-200 every times I believe it accomplish the dealer for diagnostics.. on going problems are in reality tally up. I m undecided to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a tiny more about the problem history. It currently has a master tech official idle let breathe control valve and tps installed. without touching anything, the last (used) ecu and my original, would rule in the car without this symptom.
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