Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize 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) upon tps, iac and maf and cleaned the TB. After trying 2-3 swing 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. yet had issues. help to the dealer.. this time he says, it needs a ECU. I did a lot of research upon them, and found that its a common problem bearing in mind 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 all sorts of diagnostics on every linked parts (tps, maf, iac). 0-200 all times I put up with it attain the dealer for diagnostics.. upon going problems are really adding up. I m unsure to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I bought it in July, drove it house from LA (to Utah), and the problems started shortly after I got it home.Any supplementary back up you can pay for is appreciated. I don't know what else to get but endure it help to the dealer. I know I've got the shop foreman working upon it at the dealer, but I nevertheless character its pushed to the back as its out of date and everyone loses in this situation.
past I begin the car, the engine surges up amid 1200 and 2000 rpm put up to and forth. I misused the IAC and the TPS taking into account no fiddle with in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to get used to the idle readiness screw to lower the rpm and it would keep for a while. Now, the engine is continuously surging to the tapering off where I cannot steer it for terrify of damage to the drive train. Any experienced solution?