99 Lexus Gs300 Wiring Diagram

Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make known car that I am ready to steer off a cliff. had a idle surge trouble that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 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. yet had issues. encourage to the dealer.. this mature he says, it needs a ECU. I did a lot of research on them, and found that its a common suffering past 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 habit to be re-adjusted? The master tech did every sorts of diagnostics on every combined parts (tps, maf, iac). $100-200 all mature I agree to it get the dealer for diagnostics.. on going problems are essentially adding up up. I m hesitant to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason


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I started the car up this morning, it starts going on and runs at 1750 and within a minute or hence climbs greater than 2500.. It is running mild though, just habit complex than it should be. I plus checked the throttle screw plate/return screw, with intent turned it out and nothing changed. put it back to exactly where it was. No vacuum leak sounds and all associates verified. I air fine roughly them as I've been in there a bunch of times..



I don't have any check engine lights unless I unplug the MAF sensor. in imitation of the MAF is plugged in then the car will stall unless I put my foot on the accelerator. There is as well as an intermittent popping hermetically sealed coming at idle.



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