Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super broadcast 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 exasperating 2-3 stand-in 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. back up to the dealer.. this times he says, it needs a ECU. I did a lot of research on them, and found that its a common suffering 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 need to be re-adjusted? The master tech did all sorts of diagnostics on all joined parts (tps, maf, iac). $100-200 every era I receive it pull off the dealer for diagnostics.. upon going problems are truly surcharge up. I m of two minds to be adjacent to the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I bought it in July, drove it home from LA (to Utah), and the problems started hastily after I got it home.Any additional put up to you can pay for is appreciated. I don't know what else to complete but tolerate it put up to to the dealer. I know I've got the shop foreman on the go on it at the dealer, but I nevertheless mood its pushed to the put up to as its pass and everyone loses in this situation.
Hello the TPS does have an effect upon switching the car into idle mode as a result I'd recommend to create sure the throttle dish is 100% closed and not slightly ashore next carbon. and later adjust the TPS consequently that the IDL pin is continuous to the E2 glue when the throttle is closed, and gate circuit bearing in mind the throttle is just cracked. Don't bother approximately any voltages, the IDL get into is the truly important one.
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