Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push car that I am ready to steer off a cliff. had a idle surge suffering 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 era he says, it needs a ECU. I did a lot of research on them, and found that its a common misfortune in imitation of 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 habit to be re-adjusted? The master tech did every sorts of diagnostics upon all similar parts (tps, maf, iac). $100-200 all period I recognize it complete the dealer for diagnostics.. upon going problems are really count up. I m in two minds to be adjacent 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 hastily after I got it home.Any extra incite you can have enough money is appreciated. I don't know what else to do but believe it back up to the dealer. I know I've got the shop foreman keen on it at the dealer, but I still character its pushed to the put up to as its old-fashioned and everyone loses in this situation.
Hello the TPS does have an effect on switching the car into idle mode thus I'd suggest to make distinct the throttle plate is 100% closed and not slightly ashore later than carbon. and after that accustom yourself the TPS thus that the IDL glue is continuous to the E2 attach in the same way as the throttle is closed, and edit circuit following the throttle is just cracked. Don't cause problems nearly any voltages, the IDL contact is the in point of fact important one.
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