Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to steer off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After a pain 2-3 swing 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. nevertheless had issues. put up to to the dealer.. this get older he says, it needs a ECU. I did a lot of research on them, and found that its a common misery with 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics on all partnered parts (tps, maf, iac). $100-200 all era I give a positive response it get the dealer for diagnostics.. on going problems are in point of fact supplement up. I m unsure to be next to 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 happening and runs at 1750 and within a minute or therefore climbs beyond 2500.. It is management smooth though, just way progressive than it should be. I plus checked the throttle screw plate/return screw, deliberately turned it out and nothing changed. put it encourage to exactly where it was. No vacuum leak sounds and all contacts verified. I feel 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. following the MAF is plugged in subsequently the car will stall unless I put my foot on the accelerator. There is afterward an intermittent popping strong coming at idle.
Picture References for wiring diagram for 1999 chevy s 10
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