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 difficulty that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After grating 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. back up to the dealer.. this period he says, it needs a ECU. I did a lot of research upon them, and found that its a common hardship in the manner of 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics on every linked parts (tps, maf, iac). 0-200 every period I believe it accomplish the dealer for diagnostics.. upon going problems are truly addendum up. I m hesitant to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
Might moreover be worth checking the wiring and connector to the airflow meter for any signs of corrosion or damage. you can accomplish a quick malformation locate if you unplug the meter and run the engine without it. if the engine condition is the same next chances are the meter or the association to it is faulty. Its also worth cleaning the MAF sensor wires, as they can get coated later dirt beyond time which after that offsets the reading. Use some way in cleaner or brake cleaner to vaporizer onto the wires to sever the dirt on no account touch the wires in the manner of whatever as they are unquestionably fragile
Hello the TPS does have an effect on switching the car into idle mode suitably I'd suggest to make certain the throttle plate is 100% closed and not slightly stranded behind carbon. and then familiarize the TPS in view of that that the IDL stick is continuous to the E2 glue considering the throttle is closed, and right of entry circuit once the throttle is just cracked. Don't make miserable very nearly any voltages, the IDL entre is the in fact important one.