Thread: Rpm surge help??

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  1. #1 Rpm surge help?? 
    Darkcelle
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    Default 05-13-2009
    Trying to solve a weird rpm idle while driving. I can be driving down the road and without giving any gas the rpm will go from around 1200 to 800. This only seems to happen while driving and not at a sitting idle. No mods on the engine. Mileage is around 130,000. Please advise. Could this be a bad fuel filter or fuel pressure regulator?
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  2. #2 Re: Rpm surge help?? 
    blueguy
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    Default 05-14-2009
    Throw any codes? CPS maybe...
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