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Differences in Idling Speed?

This is a discussion on Differences in Idling Speed? within the General Help forums, part of the LSx Technical Help Section category; I have noticed that stock for stock (as far as I know) My '94 Formula Idles MUCH more fast than ...

  1. #1

    Differences in Idling Speed?

    I have noticed that stock for stock (as far as I know) My '94 Formula Idles MUCH more fast than my '94 Z28. Is this normal..or are these two cars supposed to have similar or the same idling speed. It worries me because the formula eats way more gas than the Z and I trying to figure out why. Can anyone shed some light on this for me?

  2. #2
    Life in the Fast lane sunsetorangess's Avatar
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    Met. Sunset Orange
    01 SS

    Whats the idle at?
    Any mods to either?
    Both auto or std?
    Miles on both?
    J
    2001 SS, Its not the car its the Driver that matters....

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    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
    98' trans am

    not really. i wouldn't worry about it. the lt1 and the ls1 are different engines ...as long as they arent idling at 1k+ you are fine...also are you talking about idling after op temp or before?

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    Life in the Fast lane sunsetorangess's Avatar
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    Met. Sunset Orange
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    Quote Originally Posted by shady milkman View Post
    not really. i wouldn't worry about it. the lt1 and the ls1 are different engines ...as long as they arent idling at 1k+ you are fine...also are you talking about idling after op temp or before?
    There both lt1's
    J

  5. #5
    Senior Member SeVeReDiStOrTiOn's Avatar
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    05 Wrangler
    00 Z28 sold :-(

    Have you cleaned the IAC and/or checked for vacuum leaks

  6. #6
    They both are around 100K on the clock and the Z is an auto. and the bird is a stick. We were attempting to replace the a/c compressor on the car and charge the system today and found that the PCM is fried. Partially. We can activate the compressor from the fuse manually, but it wont do it on it's own. All the wiring is good too. The bird idles actually about 1K so could the PCM also be causing my funny idle?

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