Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make known car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After irritating 2-3 interchange 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. put up to to the dealer.. this era he says, it needs a ECU. I did a lot of research upon them, and found that its a common trouble later 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics upon all related parts (tps, maf, iac). 0-200 all get older I believe it attain the dealer for diagnostics.. on going problems are in reality tally up. I m in two minds to lie alongside 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 unexpectedly after I got it home.Any further urge on you can have the funds for is appreciated. I don't know what else to accomplish but resign yourself to it encourage to the dealer. I know I've got the shop foreman operating on it at the dealer, but I nevertheless mood its pushed to the back up as its old-fashioned and everyone loses in this situation.
similar to I begin the car, the engine surges going on surrounded by 1200 and 2000 rpm put up to and forth. I distorted the IAC and the TPS subsequent to no correct in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adjust the idle eagerness screw to humiliate the rpm and it would withhold for a while. Now, the engine is for eternity surging to the dwindling where I cannot drive it for frighten of damage to the steer train. Any experienced solution?