Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super make known 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 trying 2-3 every other 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 time he says, it needs a ECU. I did a lot of research on them, and found that its a common hardship taking into consideration 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 habit to be re-adjusted? The master tech did all sorts of diagnostics on all connected parts (tps, maf, iac). 0-200 every era I take it complete the dealer for diagnostics.. upon going problems are really appendage up. I m unsure to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I bought it in July, drove it home from LA (to Utah), and the problems started hastily after I got it home.Any new put up to you can find the money for is appreciated. I don't know what else to complete but assume it help to the dealer. I know I've got the shop foreman vigorous upon it at the dealer, but I yet quality its pushed to the help as its old and everyone loses in this situation.
I don't have any check engine lights unless I unplug the MAF sensor. bearing in mind the MAF is plugged in later the car will stall unless I put my foot on the accelerator. There is then an intermittent popping solid coming at idle.