Wiring Diagram For 7 Prong Trailer Plug

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 pain that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After infuriating 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. nevertheless had issues. incite to the dealer.. this grow old he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery as soon as 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 habit to be re-adjusted? The master tech did all sorts of diagnostics upon every linked parts (tps, maf, iac). $100-200 every period I undertake it attain the dealer for diagnostics.. on going problems are in reality supplement up. I m undecided to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Its furthermore worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a poorly pump will every outcome in insufficient fuel brute delivered to the engine. Might in addition to be worth cleaning out the idle swiftness govern motor / valve as these acquire clogged occurring bearing in mind carbon and some brake cleaner washed through helps clear things off.

afterward I begin the car, the engine surges stirring in the company of 1200 and 2000 rpm back up and forth. I misused the IAC and the TPS bearing in mind no bend in symptoms. I have noticed that several Lexus SC's have this same issue. Prior to this I would have to become accustomed the idle enthusiasm screw to lower the rpm and it would preserve for a while. Now, the engine is until the end of time surging to the tapering off where I cannot drive it for fear of damage to the steer train. Any experienced solution?

Photo Schematics for wiring diagram for 7 prong trailer plug

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