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) on tps, iac and maf and cleaned the TB. After infuriating 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. nevertheless had issues. incite to the dealer.. this period he says, it needs a ECU. I did a lot of research upon them, and found that its a common pain in the manner of this car.. bought a used one.. more trouble. had the original 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 amalgamated parts (tps, maf, iac). 0-200 every become old I understand it complete the dealer for diagnostics.. upon going problems are in point of fact additive up. I m in two minds to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I did re-check them tho. The master tech did extensive tests on the expose flow meter and said it was good. next I unplug it and manage the motor, the car runs uncompromising and at 850ish. I can solitary 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 manage in the rotate of rpm though? I think it on your own adjusts it in the region of 1k..
I don't have any check engine lights unless I unplug the MAF sensor. taking into account the MAF is plugged in next the car will stall unless I put my foot upon the accelerator. There is with an intermittent popping sealed coming at idle.