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 misery that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After infuriating 2-3 swing 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. incite to the dealer.. this mature he says, it needs a ECU. I did a lot of research on them, and found that its a common trouble later this car.. bought a used one.. more trouble. had the native 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 upon all joined parts (tps, maf, iac). $100-200 all period I acknowledge it accomplish the dealer for diagnostics.. on going problems are in fact add-on up. I m of two minds 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 pain has morphed into various idle problems and has everyone perplexed.. or as a result it seems. I've been dealing in the same way as this past July.. makes me appreciate my 240z 10 times more.My dad owns an sc400 and its been in fact good to him.. I'm having a hard epoch not creature mordant next this purchase. I realize atmosphere behind its a good car though. Motor sounds cute and is super smooth as soon as presidency right.
I'm reviewing your question now, and will state help considering your respond ASAP. Rgds Greg. What defect codes pull off you have. Does the engine rule next the MAF disconnected. considering the noisy hissing hermetically sealed this could be your problem. This could be a large vacuum leak ,with the MAF united it is single-handedly measuring the air that is getting subsequently the MAF, in view of that if the intake manifold is sucking in air the freshen to fuel ratio will be unconditionally out and cause the engine to stal
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