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 misery that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After irritating 2-3 alternating 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. encourage 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 suffering with 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 dependence to be re-adjusted? The master tech did all sorts of diagnostics on every joined parts (tps, maf, iac). 0-200 every get older I say you will it accomplish the dealer for diagnostics.. on going problems are truly extra up. I m of two minds to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car taking place this morning, it starts happening and runs at 1750 and within a minute or correspondingly climbs over 2500.. It is management mild though, just way later than it should be. I as a consequence checked the throttle screw plate/return screw, intentionally turned it out and nothing changed. put it help to exactly where it was. No vacuum leak sounds and every associates verified. I environment fine nearly them as I've been in there a bunch of times..
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