Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After trying 2-3 alternative 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. help to the dealer.. this era he says, it needs a ECU. I did a lot of research upon them, and found that its a common problem taking into account 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 craving to be re-adjusted? The master tech did all sorts of diagnostics on every partnered parts (tps, maf, iac). 0-200 every time I agree to it realize the dealer for diagnostics.. on going problems are in point of fact additive up. I m hesitant to lie alongside 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 tell you a little more virtually the difficulty history. It currently has a master tech recognized idle expose run valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would manage in the car without this symptom.
Hello the TPS does have an effect on switching the car into idle mode fittingly I'd recommend to make distinct the throttle dish is 100% closed and not slightly high and dry considering carbon. and later acclimatize the TPS therefore that the IDL stick is continuous to the E2 stick as soon as the throttle is closed, and right to use circuit subsequently the throttle is just cracked. Don't distress very nearly any voltages, the IDL admittance is the really important one.