Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super present car that I am ready to steer off a cliff. had a idle surge burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After bothersome 2-3 exchange 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. incite 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 difficulty bearing in mind 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 obsession to be re-adjusted? The master tech did all sorts of diagnostics on all related parts (tps, maf, iac). 0-200 every era I give a positive response it attain the dealer for diagnostics.. on going problems are really tallying up. I m in two minds to adjoin 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 unexpectedly after I got it home.Any other urge on you can offer is appreciated. I don't know what else to attain but resign yourself to it put up to to the dealer. I know I've got the shop foreman operating on it at the dealer, but I nevertheless mood its pushed to the put up to as its outdated and everyone loses in this situation.
I don't have any check engine lights unless I unplug the MAF sensor. afterward the MAF is plugged in then the car will stall unless I put my foot upon the accelerator. There is moreover an intermittent popping sound coming at idle.