LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Faulty Stepper Motor on 1UZ Throttle Body ?

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Old 10-02-13, 12:12 PM
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MattLS400
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Default Faulty Stepper Motor on 1UZ Throttle Body ?

Good day, I am currently experiencing Intermittent idle once the engine is warm.

As such, i would like to inquire whether or not this symptom relates to a faulty Stepper Motor on the Throttle Body of a 1UZ ?

Please provide me with a part number for this Stepper Motor for a 1UZ on a 1996 JDM Celsior

or

Does anyone have a link where a new one can be sourced on ebay or amazon.

Thanks!
Old 10-02-13, 12:56 PM
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steve2006
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I'm not aware of a stepper motor on the 1996 Celsior, you should have a main and sub throttle TPS and a traction control servo motor.
Idle problems are normally due to a dirty Throttle body, a faulty IACV or a faulty main TPS.
Also check all vacuum pipes for damage/leaks
Old 10-04-13, 07:52 AM
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MattLS400
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Part Number for IACV Please
Old 10-04-13, 07:53 AM
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MattLS400
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Originally Posted by steve2006
I'm not aware of a stepper motor on the 1996 Celsior, you should have a main and sub throttle TPS and a traction control servo motor.
Idle problems are normally due to a dirty Throttle body, a faulty IACV or a faulty main TPS.
Also check all vacuum pipes for damage/leaks

Thanks steve. I thought the stepper motor is on the IACV ?
Old 10-04-13, 10:24 AM
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timmy0tool
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when i hear stepper motor, i think of a fly-by-wire throttle body, which our cars do not have.
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