Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super promote car that I am ready to drive off a cliff. had a idle surge trouble that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After aggravating 2-3 vary 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. back up to the dealer.. this epoch he says, it needs a ECU. I did a lot of research on them, and found that its a common problem similar to 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 craving to be re-adjusted? The master tech did all sorts of diagnostics upon every similar parts (tps, maf, iac). 0-200 every period I recognize it complete the dealer for diagnostics.. upon going problems are essentially accumulation up. I m undecided to lie alongside 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 upon the let breathe flow meter and said it was good. gone I unplug it and control the motor, the car runs severe and at 850ish. I can without help guess that my additional rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of every this. I don't think the tps has that much direct in the rotate of rpm though? I think it without help adjusts it as regards 1k..
I don't have any check engine lights unless I unplug the MAF sensor. later than the MAF is plugged in after that the car will stall unless I put my foot on the accelerator. There is as a consequence an intermittent popping sealed coming at idle.