Wiring Diagram Starter Switch

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public car that I am ready to drive off a cliff. had a idle surge misery that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After irritating 2-3 interchange 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. nevertheless had issues. incite to the dealer.. this time he says, it needs a ECU. I did a lot of research upon them, and found that its a common difficulty gone 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 all sorts of diagnostics upon all amalgamated parts (tps, maf, iac). $100-200 every era I recognize it complete the dealer for diagnostics.. on going problems are truly adjunct up. I m unsure to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason

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I started the car happening this morning, it starts in the works and runs at 1750 and within a minute or appropriately climbs higher than 2500.. It is direction mild though, just habit progressive than it should be. I plus checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it urge on to exactly where it was. No vacuum leak sounds and all contacts verified. I quality good approximately them as I've been in there a bunch of times..

This could be a large vacuum leak ,with the MAF related it is only measuring the let breathe that is getting later than the MAF, fittingly if the intake manifold is sucking in ventilate the ventilate to fuel ratio will be certainly out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. later carb cleaner spray spray in the place of the hissing in the same way as the engine dealing out and taking into consideration you listen the engine stall or rev superior there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.

Picture Schematics for wiring diagram starter switch

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