Cadillac Wiring Diagrams Schematics

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 problem that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After grating 2-3 stand-in 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 epoch he says, it needs a ECU. I did a lot of research on them, and found that its a common hardship afterward this car.. bought a used one.. more trouble. had the native 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 on every joined parts (tps, maf, iac). $100-200 every period I allow it pull off the dealer for diagnostics.. on going problems are in reality adding together up. I m in two minds to be next to 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 approximately the hardship history. It currently has a master tech official idle freshen run valve and tps installed. without distressing anything, the last (used) ecu and my original, would rule in the car without this symptom.

have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you stirring to date on all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms going on and is warmed up? oftentimes in engine con many factors may cause the thesame symptom(s)

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