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 misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After infuriating 2-3 every other 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. back 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 pain afterward 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics upon every amalgamated parts (tps, maf, iac). 0-200 all become old I recognize it reach the dealer for diagnostics.. on going problems are in point of fact count up. I m unsure 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 tiny more approximately the pain history. It currently has a master tech approved idle let breathe manage valve and tps installed. without heartwarming anything, the last (used) ecu and my original, would run in the car without this symptom.
Hello the TPS does have an effect upon switching the car into idle mode thus I'd recommend to make certain the throttle dish is 100% closed and not slightly stuck next carbon. and later acclimatize the TPS for that reason that the IDL fix is continuous to the E2 pin behind the throttle is closed, and open circuit in the same way as the throttle is just cracked. Don't trouble nearly any voltages, the IDL entrance is the truly important one.