Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to steer off a cliff. had a idle surge misery that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After grating 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. urge on to the dealer.. this grow old he says, it needs a ECU. I did a lot of research upon them, and found that its a common burden subsequent to 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 need to be re-adjusted? The master tech did all sorts of diagnostics upon all similar parts (tps, maf, iac). 0-200 all period I give a positive response it attain the dealer for diagnostics.. on going problems are in fact totaling up. I m unsure to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
I bought it in July, drove it house from LA (to Utah), and the problems started tersely after I got it home.Any supplementary urge on you can have the funds for is appreciated. I don't know what else to accomplish but say yes it encourage to the dealer. I know I've got the shop foreman functioning upon it at the dealer, but I yet tone its pushed to the back up as its old-fashioned and everyone loses in this situation.
I don't have any check engine lights unless I unplug the MAF sensor. taking into consideration the MAF is plugged in later the car will stall unless I put my foot upon the accelerator. There is next an intermittent popping unassailable coming at idle.