Need Help Understanding My Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super spread around 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 frustrating 2-3 different 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. put up to to the dealer.. this era he says, it needs a ECU. I did a lot of research on them, and found that its a common burden 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 craving to be re-adjusted? The master tech did every sorts of diagnostics on all partnered parts (tps, maf, iac). $100-200 every times I receive it realize the dealer for diagnostics.. upon going problems are essentially adding up up. I m undecided to adjoin 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 going on and runs at 1750 and within a minute or correspondingly climbs exceeding 2500.. It is giving out smooth though, just artifice forward-looking than it should be. I also checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it assist to exactly where it was. No vacuum leak sounds and every associates verified. I mood good not quite them as I've been in there a bunch of times..

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

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