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What is the correct idle for 1991 ls400 at warm engine temperature?

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Old 01-29-07, 09:44 PM
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Default What is the correct idle for 1991 ls400 at warm engine temperature?
In park and in drive? I think mine is at below 500 in park and this sounds low? ThanksNEl
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Old 01-29-07, 10:28 PM
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is that with or w/o AC and warm or cold?

sounds a TAD low.
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Old 01-29-07, 10:49 PM
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That does sound low. Have you had any maintenance done lately?
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Old 01-30-07, 02:26 PM
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In drive or reverse with a warm engine and no a/c and no lights on its around 400rpms. I am going to see how the throttle body looks today. I just purchased it and dont have any service history so I am in the blind. ThanksNel
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Old 01-30-07, 02:43 PM
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should be around 600 +/- 50
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Old 01-30-07, 08:29 PM
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Thanks for the reply Is that in gear or in park? Warm engine? Thanks again
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Old 01-31-07, 07:02 AM
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in Park with a warm motor idle should be 600 +/- 50rpm.
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Old 01-31-07, 10:54 PM
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Thanks again! Nel
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