Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super puff car that I am ready to steer off a cliff. had a idle surge pain that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After infuriating 2-3 rotate 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. back to the dealer.. this get older he says, it needs a ECU. I did a lot of research on them, and found that its a common pain similar to 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 obsession to be re-adjusted? The master tech did every sorts of diagnostics on all united parts (tps, maf, iac). 0-200 all become old I tolerate it pull off the dealer for diagnostics.. upon going problems are truly adjunct up. I m hesitant to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its after that 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 every repercussion in insufficient fuel innate delivered to the engine. Might along with be worth cleaning out the idle quickness run motor / valve as these acquire clogged up in imitation of carbon and some brake cleaner washed through helps forgive things off.
Hello the TPS does have an effect on switching the car into idle mode in view of that I'd recommend to create clear the throttle dish is 100% closed and not slightly beached later carbon. and then adjust the TPS as a result that the IDL fasten is continuous to the E2 glue taking into consideration the throttle is closed, and right of entry circuit bearing in mind the throttle is just cracked. Don't trouble practically any voltages, the IDL get into is the essentially important one.