Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super shout from the rooftops car that I am ready to steer off a cliff. had a idle surge problem that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After irritating 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. still had issues. put up to 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 misery taking into account 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics upon all related parts (tps, maf, iac). 0-200 every times I bow to it reach the dealer for diagnostics.. upon going problems are really tallying up. I m unsure to lie alongside 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 pain has morphed into various idle problems and has everyone perplexed.. or as a result it seems. I've been dealing considering this before July.. makes me appreciate my 240z 10 era more.My father owns an sc400 and its been really good to him.. I'm having a difficult get older not swine cutting like this purchase. I reach tone behind its a good car though. Motor sounds delightful and is super serene gone management right.
I don't have any check engine lights unless I unplug the MAF sensor. bearing in mind the MAF is plugged in then the car will stall unless I put my foot upon the accelerator. There is next an intermittent popping hermetic coming at idle.