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 misery that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After trying 2-3 swing 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. 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 difficulty subsequent 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 every aligned parts (tps, maf, iac). 0-200 all era I agree to it attain the dealer for diagnostics.. upon going problems are really totaling up. I m hesitant to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
Its as well as 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 every repercussion in insufficient fuel mammal delivered to the engine. Might plus be worth cleaning out the idle quickness run motor / valve as these acquire clogged up once carbon and some brake cleaner washed through helps forgive things off.
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