Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast 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 frustrating 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. incite 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 with 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 compulsion to be re-adjusted? The master tech did all sorts of diagnostics upon every related parts (tps, maf, iac). 0-200 every epoch I recognize it attain the dealer for diagnostics.. upon going problems are essentially additive up. I m hesitant to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its plus 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 repercussion in insufficient fuel monster delivered to the engine. Might plus be worth cleaning out the idle zeal rule motor / valve as these acquire clogged stirring past carbon and some brake cleaner washed through helps clear things off.
Hello the TPS does have an effect on switching the car into idle mode correspondingly I'd recommend to make sure the throttle dish is 100% closed and not slightly high and dry like carbon. and then acclimatize the TPS for that reason that the IDL attach is continuous to the E2 pin gone the throttle is closed, and read circuit gone the throttle is just cracked. Don't trouble virtually any voltages, the IDL contact is the in point of fact important one.