Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super announce 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 aggravating 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. yet had issues. help to the dealer.. this mature he says, it needs a ECU. I did a lot of research on them, and found that its a common misfortune as soon as 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 every sorts of diagnostics upon all partnered parts (tps, maf, iac). 0-200 every times I acknowledge it pull off the dealer for diagnostics.. on going problems are essentially adjunct up. I m unsure to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its with worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a poorly pump will every result in insufficient fuel swine delivered to the engine. Might afterward be worth cleaning out the idle eagerness rule motor / valve as these acquire clogged occurring taking into account carbon and some brake cleaner washed through helps release things off.
like I begin the car, the engine surges going on amid 1200 and 2000 rpm assist and forth. I distorted the IAC and the TPS considering no amend in symptoms. I have noticed that several Lexus SC's have this thesame issue. Prior to this I would have to acclimatize the idle readiness screw to humiliate the rpm and it would maintain for a while. Now, the engine is for all time surging to the point where I cannot steer it for unease of broken to the drive train. Any experienced solution?