Won't maintain speed

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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Won't maintain speed in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; I have a 2005 cts 3.6 with a 110,000 miles on it and I am having an issue. It seems ...
  1. #1
    ecudd is offline Cadillac Owners Member
    Automobile(s): 2005 cts 3.6
    Join Date
    May 2013

    Won't maintain speed

    I have a 2005 cts 3.6 with a 110,000 miles on it and I am having an issue. It seems to idle pretty well and accelerate but when I get up to speed and just try to maintain it seems like it is cutting in and out. Like it looses gas a bit then kicks back in. Its almost like you are tapping the gas pedal. I just had the plugs changed last year. I know my description isn't very good but if someone can help please do. Thank you

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  3. #2
    Iceman_jd's Avatar
    Iceman_jd is offline Cadillac Owners Fanatic
    Automobile(s): 2007 3.6 CTS
    Join Date
    Oct 2012

    Re: Won't maintain speed

    Possible clogged fuel filter?

  4. #3
    CTSM is offline Cadillac Owners Enthusiast
    Automobile(s): CTS 08' 3.6 DI Performance | 07' Lux 3.6 Volant-Borla-Vsways
    Join Date
    Mar 2012

    Re: Won't maintain speed

    ^that, fuel filter is dirty and is preventing the high amount of fuel flow that is necessary for the engine to keep performing at that power level, so throttle is cut back as there is not enough fuel to keep the engine going at those speeds. Replace the fuell filter and things should go back to normal...if not there are other suspects that would need to be rounded up, but sounds like a fuel filter case to me, especially if you haven't changed it in 110,000 miles

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