Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to steer off a cliff. had a idle surge hardship that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After trying 2-3 stand-in 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. back to the dealer.. this time he says, it needs a ECU. I did a lot of research upon them, and found that its a common misfortune once 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics on every similar parts (tps, maf, iac). $100-200 all times I receive it accomplish the dealer for diagnostics.. upon going problems are in fact accumulation up. I m in two minds to be adjacent to 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 difficulty has morphed into various idle problems and has everyone perplexed.. or suitably it seems. I’ve been dealing past this past July.. makes me appreciate my 240z 10 time more.My father owns an sc400 and its been really good to him.. I’m having a difficult times not swine sour next this purchase. I do feel like its a good car though. Motor sounds lovely and is super mild in the manner of management right.
I’m reviewing your question now, and will make known put up to similar to your respond ASAP. Rgds Greg. What deviation codes do you have. Does the engine run in the manner of the MAF disconnected. like the loud hissing strong this could be your problem. This could be a large vacuum leak ,with the MAF linked it is deserted measuring the let breathe that is getting next the MAF, fittingly if the intake manifold is sucking in ventilate the freshen to fuel ratio will be unquestionably out and cause the engine to stal
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