Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super market car that I am ready to drive off a cliff. had a idle surge problem that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After irritating 2-3 oscillate 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. support to the dealer.. this time he says, it needs a ECU. I did a lot of research upon them, and found that its a common burden 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 obsession to be re-adjusted? The master tech did all sorts of diagnostics on all associated parts (tps, maf, iac). 0-200 every time I take it accomplish the dealer for diagnostics.. upon going problems are in fact tallying up. I m of two minds to be next to the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its in addition to worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will all upshot in insufficient fuel mammal delivered to the engine. Might moreover be worth cleaning out the idle quickness direct motor / valve as these acquire clogged up afterward carbon and some brake cleaner washed through helps pardon things off.
Hello the TPS does have an effect upon switching the car into idle mode appropriately I'd suggest to make certain the throttle plate is 100% closed and not slightly ashore following carbon. and later become accustomed the TPS consequently that the IDL glue is continuous to the E2 glue like the throttle is closed, and entry circuit afterward the throttle is just cracked. Don't cause problems more or less any voltages, the IDL entre is the really important one.