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Thread: Surging Idle while Coasting

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  1. #1
    Senior Member
    Join Date
    Jun 2009
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    195

    Default Surging Idle while Coasting

    Got the car tuned in pretty well and idling nicely, however I have notice one annoying thing which i can't figure out. For some reason if the car is coasting to a stop at idle it will begin to surge. once you stop the idle tables must change and the surging will always stop, but any time your rolling with 0% throttle at an idle rpm it will surge... Any suggestions on what to look at or change? I have enclosed both a screen shot of the scan, and the tune. File

    I thought it was possibly the fuel or spark cells it was pulling from had drastically different values causing the surge, so i put all the same values in for the timing and smooth out the fuel tables. this didn't help.
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    Last edited by gpr; July 31st, 2013 at 06:17 AM.

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