Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to drive off a cliff. had a idle surge trouble that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After infuriating 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. nevertheless had issues. back up to the dealer.. this mature he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery 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 infatuation to be re-adjusted? The master tech did every sorts of diagnostics upon all partnered parts (tps, maf, iac). 0-200 every mature I admit it accomplish the dealer for diagnostics.. on going problems are in fact count up. I m hesitant to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might as a consequence be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can realize a fast anomaly find if you unplug the meter and run the engine without it. if the engine condition is the similar after that chances are the meter or the attachment to it is faulty. Its next worth cleaning the MAF sensor wires, as they can get coated later than dirt higher than grow old which later offsets the reading. Use some open cleaner or brake cleaner to spray can onto the wires to sever the dirt upon no account adjoin the wires behind everything as they are unquestionably fragile
Hello the TPS does have an effect on switching the car into idle mode therefore I'd recommend to create sure the throttle dish is 100% closed and not slightly stranded in the manner of carbon. and next familiarize the TPS correspondingly that the IDL stick is continuous to the E2 pin behind the throttle is closed, and open circuit afterward the throttle is just cracked. Don't distress roughly any voltages, the IDL right of entry is the in reality important one.