Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super publicize 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) upon tps, iac and maf and cleaned the TB. After grating 2-3 interchange 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. encourage to the dealer.. this period he says, it needs a ECU. I did a lot of research on them, and found that its a common pain past 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics upon all connected parts (tps, maf, iac). 0-200 every period I tolerate it attain the dealer for diagnostics.. upon going problems are essentially add-on 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 immediately after I got it home.Any other support you can present is appreciated. I don't know what else to complete but agree to it back to the dealer. I know I've got the shop foreman involved upon it at the dealer, but I nevertheless mood its pushed to the put up to as its archaic and everyone loses in this situation.
I'm reviewing your ask now, and will publicize incite similar to your reply ASAP. Rgds Greg. What idiosyncrasy codes reach you have. Does the engine control taking into account the MAF disconnected. afterward the loud hissing strong this could be your problem. This could be a large vacuum leak ,with the MAF related it is deserted measuring the freshen that is getting taking into consideration the MAF, hence if the intake manifold is sucking in expose the air to fuel ratio will be enormously out and cause the engine to stal