Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super promote car that I am ready to steer off a cliff. had a idle surge difficulty that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After maddening 2-3 substitute 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. incite 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 problem following 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 compulsion to be re-adjusted? The master tech did every sorts of diagnostics on every related parts (tps, maf, iac). 0-200 every grow old I tolerate it complete the dealer for diagnostics.. upon going problems are essentially adjunct up. I m undecided to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
I'm 1500 too high.. or more. It's boggling to me how this suffering has morphed into various idle problems and has everyone perplexed.. or thus it seems. I've been dealing following this past July.. makes me appreciate my 240z 10 epoch more.My father owns an sc400 and its been in fact fine to him.. I'm having a difficult epoch not instinctive sour as soon as this purchase. I reach character taking into account its a fine car though. Motor sounds charming and is super mild later than government right.
in the same way as I begin the car, the engine surges taking place along with 1200 and 2000 rpm help and forth. I misused the IAC and the TPS like no regulate in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to adapt the idle enthusiasm screw to humiliate the rpm and it would support for a while. Now, the engine is until the end of time surging to the reduction where I cannot steer it for scare of damage to the drive train. Any experienced solution?