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Ford Escape - popping through intake and runs rough

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  • #1

    Ford Escape - popping through intake and runs rough

    2008 Escape 3.0L 2WD 150K

    Idles rough, stumbles occasionally under load, makes a muffled popping sound that you can hear through the intake.

    What I've done so far:

    -Scanned for codes/pending codes. Nothing. No stored codes, or current codes.

    -Cleaned the MAF, t-body, and IAC. No change

    Kind of stumped. If it was a coilpack, or cam/crank sensor, wouldn't it throw a code? I don't hear or see any vacuum leaks.

    Anyone run into this? It appears to be a common issue from my Google research, but no definitive solution.

    Hopefully not a lifter or valve issue.
    Tags: None
  • #2
    sounds about like my wife's did when coil pac went bad,

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    • #3
      Clogged cats were common on some of those years.
      "When the people find that they can vote themselves money, that will herald the end of the republic." -Benjamin Franklin
      "A democracy will continue to exist up until the time that voters discover that they can vote themselves generous gifts from the public treasury." -Alexander Fraser Tytler

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      • #4
        Both of those seem reasonable.

        If a coil pack was bad, why no code? Surely there's a misfire.

        If the cat was clogged, surely the downstream O2 sensor would throw a code.

        Damn Ford!

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        • #5
          Test the coil packs with a volt meter. If that doesn't pan out and you still suspect them, I think you can take them to Oriellys and have them do some kind of check. Can't remember exactly
          WH

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          • #6
            Some escape PCM's lose the drivers for coil packs over time. It is possible it is starting to lose one now. May have to watch it with a good scanner and check power balance and see which cyl is dropping out.
            Some cars and a bike...

            Some say... they have been raced, some a lot

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            • #7
              Originally posted by SC457A View Post
              Some escape PCM's lose the drivers for coil packs over time. It is possible it is starting to lose one now. May have to watch it with a good scanner and check power balance and see which cyl is dropping out.
              Yeah, I've heard about this somewhere. It would seem it would pick up a missfire and throw a code.


              Damn Ford!!

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              • #8
                The missfire has to be often enough to set it. Check mode 6 on a good scanner...
                Some cars and a bike...

                Some say... they have been raced, some a lot

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                • #9
                  Cj is correct on the cats. Worth checking

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                  • #10
                    In-laws had an 05 did the same thing. If I remember reading on some escape forum the coil packs fail causing the unburnt fuel to ruin the cats. Think the fix required new cats, coil packs, plugs, and apparently when you replace the coil packs you have to also replace the PCM
                    --Marcus

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                    • #11
                      Sounds like its totaled, I'll offer three fiddy CASH!




                      ~Reggie Stout
                      Originally posted by Silverback
                      Look all you want, she can't find anyone else who treats her as bad as I do, and I keep her self esteem so low, she wouldn't think twice about going anywhere else.

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                      • #12
                        Originally posted by Rick Modena View Post
                        Sounds like its totaled, I'll offer three fiddy CASH!




                        ~Reggie Stout
                        pffft, that's not far from real market value right now.

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