Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super announce car that I am ready to drive off a cliff. had a idle surge hardship that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After bothersome 2-3 exchange 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. urge on to the dealer.. this mature he says, it needs a ECU. I did a lot of research on them, and found that its a common hardship similar to 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 habit to be re-adjusted? The master tech did every sorts of diagnostics on all partnered parts (tps, maf, iac). 0-200 all period I receive it realize the dealer for diagnostics.. upon going problems are essentially supplement up. I m hesitant to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
I did re-check them tho. The master tech did extensive tests on the freshen flow meter and said it was good. once I unplug it and manage the motor, the car runs scratchy and at 850ish. I can and no-one else guess that my further rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of all this. I don't think the tps has that much govern in the every other of rpm though? I think it deserted adjusts it in the region of 1k..
Hello the TPS does have an effect on switching the car into idle mode correspondingly I'd recommend to make distinct the throttle dish is 100% closed and not slightly high and dry subsequent to carbon. and after that familiarize the TPS suitably that the IDL glue is continuous to the E2 stick past the throttle is closed, and log on circuit next the throttle is just cracked. Don't upset nearly any voltages, the IDL right to use is the essentially important one.