comet running rough (help)

Discussion in 'Technical' started by mavmike72, Oct 5, 2008.

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  1. blugene

    blugene Senior member Supporting Member

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    Ok. So you were watching the light flash rapidly... that eliminates a few things.
    Did you run the engine with the light pluged in? It would look like it was on steady...
    :scratchchin:
     
    blugene, Oct 14, 2008
    #76
  2. mavmike72

    mavmike72 Member

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    Yes ....... But i just installed all new plugs again. I found a ground on the harness not grounded so i grounded it, took it out just no for a ride. Stomped the gas that thing had more power than its ever had. Then it happened it started serging again......
     
    mavmike72, Oct 14, 2008
    #77
  3. blugene

    blugene Senior member Supporting Member

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    The only other thing I can think of at this moment is a bad diode in the alternator... or HP cam lol.
    My money is still on the cap...
     
    blugene, Oct 14, 2008
    #78
  4. Mavman72

    Mavman72 Gone backwards but lookin' forward

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    Is it surgeing at idle or under power/cruise condition???
     
    Mavman72, Oct 14, 2008
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  5. LukeDuke

    LukeDuke Member

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    did you check the cap and rotor for corrosion?
     
    LukeDuke, Oct 14, 2008
    #80
  6. mavmike72

    mavmike72 Member

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    at idle when you punch it it goes.............
     
    mavmike72, Oct 14, 2008
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  7. mavmike72

    mavmike72 Member

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    well idle i mean you no crusing at about 30 just giving a little gas.
     
    mavmike72, Oct 14, 2008
    #82
  8. Mavman72

    Mavman72 Gone backwards but lookin' forward

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    Gene raised a good point:thumbs2:Hows your charging system??? check the battery terminals make sure you have a good clean connection at both,If you have a volt meter check the battery voltage.A poor connection in the system will cause a voltage drop,which will limit voltage/amperage to vital components such as injectors/fuel pump/computer etc...
     
    Mavman72, Oct 14, 2008
    #83
  9. mavmike72

    mavmike72 Member

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    ill check be back........................
     
    mavmike72, Oct 14, 2008
    #84
  10. blugene

    blugene Senior member Supporting Member

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    He is saying that #6 is dead, then I understand a slight miss at part throttle while cruising...[​IMG]





    [​IMG]
     
    blugene, Oct 14, 2008
    #85
  11. blugene

    blugene Senior member Supporting Member

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    Cap and rotor... cheap anyway if your going to throw parts on it. :)
     
    blugene, Oct 14, 2008
    #86
  12. mavmike72

    mavmike72 Member

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    1972 mercury comet with a maverick front end. It has a 1992 5.0 motor in it.
    6 is not dead any more i guess last night when i replaced the injectors that fixed that. As far as the voltage checked the battery its 12.9 started the car and its 14.5
    so i guess its charging. Im pretty sure the miss is gone for now anyways.
     
    mavmike72, Oct 14, 2008
    #87
  13. mavmike72

    mavmike72 Member

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    I put a new cap and rotor on as well.
     
    mavmike72, Oct 14, 2008
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  14. blugene

    blugene Senior member Supporting Member

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    So are you experiencing a dead spot when you go to accelerate while at part throttle while cruising?
     
    blugene, Oct 14, 2008
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  15. blugene

    blugene Senior member Supporting Member

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    When?
     
    blugene, Oct 14, 2008
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