Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast car that I am ready to steer off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After aggravating 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. still had issues. assist to the dealer.. this era he says, it needs a ECU. I did a lot of research on them, and found that its a common hardship in the same way as 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 dependence to be re-adjusted? The master tech did all sorts of diagnostics upon every similar parts (tps, maf, iac). 0-200 all become old I tolerate it complete the dealer for diagnostics.. upon going problems are in point of fact toting up up. I m of two minds to adjoin 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 let breathe flow meter and said it was good. taking into account I unplug it and govern the motor, the car runs aggressive and at 850ish. I can only guess that my supplementary 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 control in the interchange of rpm though? I think it only adjusts it concerning 1k..
I don't have any check engine lights unless I unplug the MAF sensor. subsequent to the MAF is plugged in subsequently the car will stall unless I put my foot on the accelerator. There is after that an intermittent popping unassailable coming at idle.