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 misfortune that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After a pain 2-3 vary 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. put up to to the dealer.. this mature he says, it needs a ECU. I did a lot of research upon them, and found that its a common trouble gone 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 infatuation to be re-adjusted? The master tech did all sorts of diagnostics upon all associated parts (tps, maf, iac). 0-200 every time I say you will it pull off the dealer for diagnostics.. upon going problems are in fact adding together up. I m unsure to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its as a consequence worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a not at your best pump will all consequences in insufficient fuel being delivered to the engine. Might along with be worth cleaning out the idle rapidity direct motor / valve as these get clogged occurring later carbon and some brake cleaner washed through helps release things off.
I don't have any check engine lights unless I unplug the MAF sensor. taking into consideration the MAF is plugged in then the car will stall unless I put my foot upon the accelerator. There is afterward an intermittent popping strong coming at idle.