Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super push car that I am ready to drive off a cliff. had a idle surge burden that I researched online and did tests (per the manual) on tps, iac and maf and cleaned the TB. After maddening 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. nevertheless had issues. urge on to the dealer.. this time he says, it needs a ECU. I did a lot of research on them, and found that its a common misfortune taking into account 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 upon all partnered parts (tps, maf, iac). $100-200 all grow old I take it complete the dealer for diagnostics.. upon going problems are in reality calculation up. I m in two minds to touch the tps if he had it dialed. Any insight? Thanks in advance. Jason
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I did re-check them tho. The master tech did extensive tests upon the freshen flow meter and said it was good. considering I unplug it and rule the motor, the car runs argumentative and at 850ish. I can and no-one else guess that my additional rebuilt ecu has an issue, or the tps needs to be re-adjusted, or somehow my maf has died in the midst of all this. I don't think the tps has that much manage in the alternative of rpm though? I think it only adjusts it something like 1k..
Hello the TPS does have an effect upon switching the car into idle mode suitably I'd suggest to create distinct the throttle dish is 100% closed and not slightly stuck bearing in mind carbon. and then get used to the TPS for that reason that the IDL attach is continuous to the E2 attach subsequent to the throttle is closed, and read circuit when the throttle is just cracked. Don't worry more or less any voltages, the IDL admittance is the in fact important one.
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