Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize car that I am ready to drive off a cliff. had a idle surge misfortune that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After exasperating 2-3 stand-in 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. back 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 pain behind 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 need to be re-adjusted? The master tech did all sorts of diagnostics upon all aligned parts (tps, maf, iac). 0-200 all times I say yes it realize the dealer for diagnostics.. on going problems are truly count up. I m of two minds to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I'm 1500 too high.. or more. It's boggling to me how this hardship has morphed into various idle problems and has everyone perplexed.. or in view of that it seems. I've been dealing past this since July.. makes me appreciate my 240z 10 epoch more.My daddy owns an sc400 and its been really fine to him.. I'm having a difficult grow old not physical sour similar to this purchase. I complete tone in the manner of its a fine car though. Motor sounds endearing and is super smooth in the manner of management right.
I don't have any check engine lights unless I unplug the MAF sensor. with the MAF is plugged in later the car will stall unless I put my foot on the accelerator. There is after that an intermittent popping hermetically sealed coming at idle.