Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super spread around 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) upon tps, iac and maf and cleaned the TB. After infuriating 2-3 alternative 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. assist to the dealer.. this times he says, it needs a ECU. I did a lot of research on them, and found that its a common misfortune later than this car.. bought a used one.. more trouble. had the indigenous 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics upon all linked parts (tps, maf, iac). 0-200 every mature I say you will it accomplish the dealer for diagnostics.. on going problems are in point of fact calculation up. I m of 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 upon the freshen flow meter and said it was good. subsequently I unplug it and manage the motor, the car runs brusque and at 850ish. I can only guess that my extra rebuilt ecu has an issue, or the tps needs to be re-adjusted, or anyhow my maf has died in the midst of all this. I don't think the tps has that much run in the swing of rpm though? I think it forlorn adjusts it around 1k..
I don't have any check engine lights unless I unplug the MAF sensor. once the MAF is plugged in next the car will stall unless I put my foot upon the accelerator. There is plus an intermittent popping hermetically sealed coming at idle.