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) upon tps, iac and maf and cleaned the TB. After maddening 2-3 vary 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. assist 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 similar to 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics upon all partnered parts (tps, maf, iac). 0-200 every become old I take on it do the dealer for diagnostics.. on going problems are in fact accumulation up. I m in two minds to adjoin 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 nearly the difficulty history. It currently has a master tech ascribed idle let breathe govern valve and tps installed. without distressing anything, the last (used) ecu and my original, would govern in the car without this symptom.
Hello the TPS does have an effect upon switching the car into idle mode as a result I'd suggest to create certain the throttle dish is 100% closed and not slightly stuck subsequently carbon. and subsequently adapt the TPS therefore that the IDL glue is continuous to the E2 stick considering the throttle is closed, and retrieve circuit taking into account the throttle is just cracked. Don't distress not quite any voltages, the IDL entry is the truly important one.