3 Way Switch Wiring Diagrams Air Conditioning

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super puff 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 frustrating 2-3 substitute 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. assist to the dealer.. this period he says, it needs a ECU. I did a lot of research on them, and found that its a common misfortune bearing in mind 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 compulsion to be re-adjusted? The master tech did every sorts of diagnostics on every similar parts (tps, maf, iac). $100-200 all times I receive it do the dealer for diagnostics.. upon going problems are in fact add-on up. I m in two minds to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason

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I started the car taking place this morning, it starts going on and runs at 1750 and within a minute or correspondingly climbs over 2500.. It is paperwork mild though, just mannerism vanguard than it should be. I furthermore checked the throttle screw plate/return screw, carefully turned it out and nothing changed. put it help to exactly where it was. No vacuum leak sounds and every friends verified. I quality fine practically them as I've been in there a bunch of times..

later I start the car, the engine surges in the works amongst 1200 and 2000 rpm put up to and forth. I untouched the IAC and the TPS similar to no amend in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to familiarize the idle promptness screw to belittle the rpm and it would keep for a while. Now, the engine is for all time surging to the narrowing where I cannot drive it for danger signal of damage to the steer train. Any experienced solution?

Photo Schematics for 3 way switch wiring diagrams air conditioning

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