Wiring Diagram Toyota Soarer

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 misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After maddening 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. still had issues. urge on to the dealer.. this times he says, it needs a ECU. I did a lot of research upon them, and found that its a common problem gone 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 need to be re-adjusted? The master tech did all sorts of diagnostics on every united parts (tps, maf, iac). $100-200 all epoch I say yes it pull off the dealer for diagnostics.. on going problems are in fact adjunct up. I m undecided to lie alongside 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 hurriedly after I got it home.Any new incite you can allow is appreciated. I don't know what else to pull off but recognize it encourage to the dealer. I know I've got the shop foreman involved upon it at the dealer, but I nevertheless feel its pushed to the support as its obsolete and everyone loses in this situation.

in the same way as I start the car, the engine surges in the works in the middle of 1200 and 2000 rpm encourage and forth. I distorted the IAC and the TPS like no fine-tune in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to adapt the idle speed screw to demean the rpm and it would hold for a while. Now, the engine is for ever and a day surging to the point where I cannot steer it for panic of damage to the drive train. Any experienced solution?

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