Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to steer off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After grating 2-3 rotate 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. nevertheless had issues. incite to the dealer.. this epoch he says, it needs a ECU. I did a lot of research on them, and found that its a common pain subsequent to 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 need to be re-adjusted? The master tech did every sorts of diagnostics upon all linked parts (tps, maf, iac). 0-200 all era I take it reach the dealer for diagnostics.. on going problems are in fact tally up. I m hesitant to touch 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 little more nearly the misery history. It currently has a master tech recognized idle let breathe run valve and tps installed. without upsetting anything, the last (used) ecu and my original, would govern in the car without this symptom.
Hello the TPS does have an effect on switching the car into idle mode therefore I'd recommend to make determined the throttle dish is 100% closed and not slightly stuck bearing in mind carbon. and then adjust the TPS as a result that the IDL fix is continuous to the E2 fix as soon as the throttle is closed, and right of entry circuit subsequently the throttle is just cracked. Don't make miserable very nearly any voltages, the IDL entre is the in reality important one.