Wiring Harness 4wd Supacentre

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) upon tps, iac and maf and cleaned the TB. After aggravating 2-3 every second 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. back up to the dealer.. this epoch 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics upon every related parts (tps, maf, iac). $100-200 every era I tolerate it realize the dealer for diagnostics.. upon going problems are in point of fact surcharge up. I m undecided to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason

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I started the car stirring this morning, it starts stirring and runs at 1750 and within a minute or for that reason climbs higher than 2500.. It is meting out smooth though, just quirk higher than it should be. I next 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 every associates verified. I feel good just about them as I've been in there a bunch of times..

gone I begin the car, the engine surges up with 1200 and 2000 rpm assist and forth. I changed the IAC and the TPS taking into consideration no correct in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to get used to the idle promptness screw to belittle the rpm and it would preserve for a while. Now, the engine is for ever and a day surging to the dwindling where I cannot drive it for distress signal of damage to the drive train. Any experienced solution?

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