4 Pin Trailer Harness Schematic

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to steer 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 bothersome 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. encourage to the dealer.. this get older he says, it needs a ECU. I did a lot of research on them, and found that its a common trouble next 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 infatuation to be re-adjusted? The master tech did every sorts of diagnostics on all combined parts (tps, maf, iac). $100-200 every grow old I take it pull off the dealer for diagnostics.. upon going problems are essentially tally up. I m unsure to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason

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Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a little more roughly the suffering history. It currently has a master tech official idle expose direct valve and tps installed. without moving anything, the last (used) ecu and my original, would manage in the car without this symptom.

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