Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push car that I am ready to steer off a cliff. had a idle surge suffering that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After a pain 2-3 alternative 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. support to the dealer.. this grow old he says, it needs a ECU. I did a lot of research upon them, and found that its a common difficulty subsequent to 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 craving to be re-adjusted? The master tech did every sorts of diagnostics upon every amalgamated parts (tps, maf, iac). 0-200 every era I undertake it do the dealer for diagnostics.. on going problems are really accumulation up. I m unsure to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I started the car going on this morning, it starts occurring and runs at 1750 and within a minute or correspondingly climbs over 2500.. It is meting out mild though, just pretentiousness vanguard than it should be. I along with checked the throttle screw plate/return screw, on purpose turned it out and nothing changed. put it help to exactly where it was. No vacuum leak sounds and every links verified. I tone good very nearly them as I've been in there a bunch of times..
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