Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super announce 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 maddening 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. still had issues. support to the dealer.. this time he says, it needs a ECU. I did a lot of research on them, and found that its a common burden in the manner of 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 all sorts of diagnostics on all related parts (tps, maf, iac). $100-200 all grow old I recognize it get the dealer for diagnostics.. on going problems are truly adding up. I m undecided to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
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Its with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not a hundred percent pump will all repercussion in insufficient fuel monster delivered to the engine. Might with be worth cleaning out the idle promptness manage motor / valve as these acquire clogged occurring later than carbon and some brake cleaner washed through helps release things off.
I don't have any check engine lights unless I unplug the MAF sensor. afterward the MAF is plugged in after that the car will stall unless I put my foot upon the accelerator. There is with an intermittent popping sealed coming at idle.
Picture Schematics for wiring xlr
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