Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to steer off a cliff. had a idle surge burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After frustrating 2-3 interchange 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. put up to to the dealer.. this epoch he says, it needs a ECU. I did a lot of research upon them, and found that its a common misfortune 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 need to be re-adjusted? The master tech did all sorts of diagnostics on all joined parts (tps, maf, iac). $100-200 every epoch I consent it do the dealer for diagnostics.. upon going problems are essentially adjunct up. I m unsure to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I did re-check them tho. The master tech did extensive tests on the freshen flow meter and said it was good. similar to I unplug it and direct the motor, the car runs rough and at 850ish. I can forlorn guess that my additional rebuilt ecu has an issue, or the tps needs to be re-adjusted, or someway my maf has died in the midst of every this. I don't think the tps has that much run in the interchange of rpm though? I think it deserted adjusts it just about 1k..
I'm reviewing your question now, and will read out encourage gone your answer ASAP. Rgds Greg. What oddity codes realize you have. Does the engine run taking into consideration the MAF disconnected. past the noisy hissing hermetic this could be your problem. This could be a large vacuum leak ,with the MAF joined it is without help measuring the freshen that is getting later the MAF, consequently if the intake manifold is sucking in freshen the freshen to fuel ratio will be entirely out and cause the engine to stal
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