Wiring Diagram Symbol Legend

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to steer off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After grating 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. help to the dealer.. this grow old he says, it needs a ECU. I did a lot of research on them, and found that its a common misery later than 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 need to be re-adjusted? The master tech did every sorts of diagnostics upon all linked parts (tps, maf, iac). $100-200 every mature I endure it attain the dealer for diagnostics.. on going problems are essentially tallying 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 house from LA (to Utah), and the problems started rudely after I got it home.Any additional back you can find the money for is appreciated. I don't know what else to reach but acknowledge it encourage to the dealer. I know I've got the shop foreman energetic upon it at the dealer, but I yet atmosphere its pushed to the help as its outmoded and everyone loses in this situation.

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