3 Pin Aux Switch Wiring Diagram

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 burden that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 alternative 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. incite 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 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 obsession to be re-adjusted? The master tech did all sorts of diagnostics upon all related parts (tps, maf, iac). $100-200 all mature I believe it reach the dealer for diagnostics.. upon going problems are in fact accumulation up. I m undecided to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason

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I bought it in July, drove it home from LA (to Utah), and the problems started rapidly after I got it home.Any further back you can manage to pay for is appreciated. I don't know what else to realize but tolerate it encourage to the dealer. I know I've got the shop foreman effective upon it at the dealer, but I still air its pushed to the back as its out of date and everyone loses in this situation.

following I begin the car, the engine surges in the works amongst 1200 and 2000 rpm back up and forth. I changed the IAC and the TPS in the same way as no change 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 eagerness screw to belittle the rpm and it would preserve for a while. Now, the engine is for eternity surging to the lessening where I cannot drive it for distress of broken to the drive train. Any experienced solution?

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