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high idle

  1. Specific rough/low idle help.

    LS1/LS2 Engine Tech
    The past month or so, my 04 has been having a low idle issue. Specifically when coasting to a stop. My normal idle is around 950rpm. While coasting in neutral, the idle dips to about 450rpm and jumps back up continuously until I come to a full stop, when the idle stabilizes back to 950rpm. The...