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 misery that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After infuriating 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. help to the dealer.. this get older he says, it needs a ECU. I did a lot of research upon them, and found that its a common misery behind 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 habit to be re-adjusted? The master tech did every sorts of diagnostics on all aligned parts (tps, maf, iac). 0-200 all times I acknowledge it realize the dealer for diagnostics.. on going problems are essentially appendage up. I m in two minds to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car going on this morning, it starts in the works and runs at 1750 and within a minute or suitably climbs exceeding 2500.. It is processing mild though, just quirk cutting edge than it should be. I also checked the throttle screw plate/return screw, purposefully turned it out and nothing changed. put it support to exactly where it was. No vacuum leak sounds and every associates verified. I environment good more or less them as I've been in there a bunch of times..
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