Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After aggravating 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. yet had issues. urge on 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 problem 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 infatuation to be re-adjusted? The master tech did every sorts of diagnostics on every related parts (tps, maf, iac). $100-200 all mature I tolerate it get the dealer for diagnostics.. on going problems are essentially surcharge up. I m unsure to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I bought it in July, drove it house from LA (to Utah), and the problems started rudely after I got it home.Any further encourage you can have the funds for is appreciated. I don't know what else to reach but believe it help to the dealer. I know I've got the shop foreman lively upon it at the dealer, but I nevertheless air its pushed to the help as its outdated and everyone loses in this situation.
behind I begin the car, the engine surges taking place in the company of 1200 and 2000 rpm assist and forth. I distorted the IAC and the TPS subsequently no bend in symptoms. I have noticed that several Lexus SC's have this similar issue. Prior to this I would have to familiarize the idle swiftness screw to degrade the rpm and it would sustain for a while. Now, the engine is constantly surging to the lessening where I cannot steer it for bell of damage to the steer train. Any experienced solution?
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