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Thread: can't fix this

  1. #1
    Join Date
    Jun 2005
    Location
    columbus ohio
    Posts
    43

    can't fix this

    I'm having a very bad bucking/missfire prob on my car. hg's are new, resealed all intercooler pipes, new plugs and wires, no codes, no lights. when i put the gennisis tool on it bank 1 o2 sensor voltage was .02 constantly. o2 voltage should never be this low and should allways have cross counts. replaced the sensor, didn't help. i'm tired of replacing parts.

  2. #2
    Join Date
    Jun 2005
    Location
    columbus ohio
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    43
    almost forgot, when you give the car gas the o2 will see as many as .82 volts.

  3. #3
    Join Date
    Oct 2002
    Location
    Lincoln, NE
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    2,062
    Without knowing much more, it sounds like your DIS is shot. Bad bucking usually equals a bad DIS module. That affects the ignition, so your O2s would be off because of raw fuel possible being exhausted...

  4. #4
    Join Date
    Apr 2002
    Location
    Southern California
    Posts
    916

    Your Car

    Sounds like a bad vacuum leak. Or In the Ford book i think they misprinted the plug wire spots on the coil, two were switched. i fell for that one when i did my gaskets.
    Good luck

  5. #5
    Join Date
    Aug 2003
    Location
    Cary, North Carolina
    Posts
    5,075
    From the front, coil pack should read:


    4 6 5
    3 2 1

  6. #6
    Join Date
    Apr 2003
    Location
    Arizona
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    526
    My vote goes to the DIS module also.

  7. #7
    Join Date
    Apr 2005
    Location
    BC, Canada
    Posts
    586
    I second the wire order problem, since the motor sounds freshly re-assembled.

    Usually a bad dis will throw a code, whereas an unplugged or misplaced wire will not.

  8. #8
    Join Date
    Oct 2002
    Location
    Lincoln, NE
    Posts
    2,062
    Quote Originally Posted by Tickler
    I second the wire order problem, since the motor sounds freshly re-assembled.

    Usually a bad dis will throw a code, whereas an unplugged or misplaced wire will not.
    An unplugged or misplaced wire won't cause sever bucking though...I've been through both. The dis gives a definate bucking under any acceleration or just driving...wires crossed you have a hard time keeping the engine running period, let a lone driving. And usually it's just a dog then too, but no bucking.

    My DIS didn't throw any codes when it went...

  9. #9
    Join Date
    Jun 2005
    Location
    columbus ohio
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    i know 4 a fact that the wires are not in in the wrong order.

  10. #10
    Join Date
    Jun 2005
    Location
    columbus ohio
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    43
    is there any way of having the coil pack tested.

  11. #11
    Join Date
    Aug 2003
    Location
    Cary, North Carolina
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    The coil pack is set up in pairs. There are 2 cylinders per coil, 3 coils. So if the coil pack goes bad, you'd loose two cylinders at the time. Unplug a row of wires, (4&3, 6&2 or 5&1) and see if it changes the way it runs. You can also check plug wires at plugs to see if they are getting spark. And if you feel like pulling the coil pack off, I think Autozone can test them.

  12. #12
    Join Date
    Oct 2002
    Location
    Lincoln, NE
    Posts
    2,062
    Quote Originally Posted by nissan lover
    is there any way of having the coil pack tested.
    Keep in mind that although coils can go bad, it is much more common for the DIS to go bad than the coil. And the DIS controls the coil...

  13. #13
    Join Date
    Aug 2003
    Location
    Cary, North Carolina
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    Autozone can check your DIS too.

  14. #14
    Join Date
    Jun 2005
    Location
    columbus ohio
    Posts
    43
    by the dis what do you mean? the cam sensor, crank sensor? cam sensor is new.

  15. #15
    Join Date
    Aug 2005
    Location
    Sunrise Beach, MO
    Posts
    2,289
    the DIS is located right by your A/C compressor it says MOTORCRAFT DIS right on it


    'tony

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