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) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 vary 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. support 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 misfortune 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics on all similar parts (tps, maf, iac). 0-200 all get older I receive it get the dealer for diagnostics.. on going problems are essentially tally up. I m of 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 home from LA (to Utah), and the problems started rapidly after I got it home.Any extra support you can present is appreciated. I don't know what else to attain but assume it help to the dealer. I know I've got the shop foreman full of life on it at the dealer, but I yet environment its pushed to the assist as its obsolescent and everyone loses in this situation.
in the same way as I start the car, the engine surges happening with 1200 and 2000 rpm back up and forth. I misused the IAC and the TPS considering no tweak in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to become accustomed the idle rapidity screw to degrade the rpm and it would support for a while. Now, the engine is forever surging to the point where I cannot drive it for distress of damage to the steer train. Any experienced solution?