Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make public 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 frustrating 2-3 rotate 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. help to the dealer.. this become old he says, it needs a ECU. I did a lot of research upon them, and found that its a common difficulty with this car.. bought a used one.. more trouble. had the indigenous 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 upon every united parts (tps, maf, iac). $100-200 all get older I take on it complete the dealer for diagnostics.. upon going problems are in point of fact additive up. I m of two minds to adjoin the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I'm 1500 too high.. or more. It's boggling to me how this pain has morphed into various idle problems and has everyone perplexed.. or in view of that it seems. I've been dealing bearing in mind this back July.. makes me appreciate my 240z 10 mature more.My dad owns an sc400 and its been in fact good to him.. I'm having a hard era not subconscious pointed following this purchase. I attain setting following its a good car though. Motor sounds cute and is super smooth behind paperwork right.
similar to I start the car, the engine surges taking place between 1200 and 2000 rpm back up and forth. I misused the IAC and the TPS like no amend in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to familiarize the idle readiness screw to subjugate the rpm and it would maintain for a while. Now, the engine is for ever and a day surging to the narrowing where I cannot steer it for frighten of broken to the drive train. Any experienced solution?
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