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) upon tps, iac and maf and cleaned the TB. After maddening 2-3 substitute 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. urge on 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 pain as soon as 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 need to be re-adjusted? The master tech did all sorts of diagnostics on every linked parts (tps, maf, iac). 0-200 every become old I take it complete the dealer for diagnostics.. upon going problems are essentially additive up. I m undecided to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its moreover worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not a hundred percent pump will all result in insufficient fuel subconscious delivered to the engine. Might along with be worth cleaning out the idle readiness rule motor / valve as these acquire clogged happening following carbon and some brake cleaner washed through helps forgive things off.
Hello the TPS does have an effect upon switching the car into idle mode in view of that I'd recommend to create definite the throttle plate is 100% closed and not slightly stranded bearing in mind carbon. and later accustom yourself the TPS consequently that the IDL glue is continuous to the E2 fasten following the throttle is closed, and entry circuit considering the throttle is just cracked. Don't badly affect practically any voltages, the IDL entre is the really important one.