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Fhead Smell Of Gas While Driving

Discussion in 'Early CJ5 and CJ6 Tech' started by davet, May 16, 2024.

  1. May 16, 2024
    davet

    davet Member

    Andover, MN
    Joined:
    Jul 30, 2003
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    166
    ‘56 CJ5, Carter YF carb, electric fuel pump set at 2.5 lbs. It runs great and has no flat spot.
    Problem is while driving I smell raw gas. No fuel line or carb leaks. Plugs look sooty around the ring but the electrode looks tan.
    I get some blue smoke when hitting the gas.
    I’m running the down draft tube off the side valve cover.
    Any ideas?
     
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  2. May 16, 2024
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
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    Is it coming from the gas cap?
     
  3. May 16, 2024
    jeep2003

    jeep2003 Well-Known Member

    Upstate NY
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    Also check the sending unit for leaks
     
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  4. May 16, 2024
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Put the windshield down. Problem solved.
     
  5. May 16, 2024
    mickeykelley

    mickeykelley Well-Known Member

    Republic of Texas
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    Now that’s a work around.
     
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  6. May 17, 2024
    Dwins1

    Dwins1 Member

    Port Richey, Florida
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    Lol
     
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  7. May 17, 2024
    CJ51973

    CJ51973 Member

    Versailles, KY
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    filter.JPG

    I'll toss this in here. I have run this filter on every carb I have had since 2001. This would include a Carter 1 barrel (1973 CJ5 258), a Weber, Motorcraft 2 barrel, and a Rochester 2 barrel (on my 225 now). I have not had any fuel pressure issues/too much fuel pushing past the float. It's the standard filter for a 1988 Jeep YJ 258.
     
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  8. May 17, 2024
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    In all seriousness, open jeeps do tend to draw in exhaust fumes and dust behind the w/s. Perhaps the reason for venting windshields.

    I'm happier with it flat on the hood and catching bugs in my teeth.
     
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  9. May 17, 2024
    mickeykelley

    mickeykelley Well-Known Member

    Republic of Texas
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    And there is the plus to the extra protein. Eating on the road. Fast food.
     
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  10. May 17, 2024
    Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2022 Sponsor

    East Tennessee
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    Could be you are smelling the discharge from the draft tube.
     
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  11. May 18, 2024
    jeep2003

    jeep2003 Well-Known Member

    Upstate NY
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    Yes and if the exhaust is routed out the back middle and not the corner or side you will be getting fumigated aswell
     
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  12. May 18, 2024
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    ...or maybe the draft from your discharge tube? :oops:
     
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  13. May 18, 2024
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
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    If it's gas you're smelling, not exhaust, then the gas cap per post Glen in post #2 makes the most sense.
     
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  14. May 18, 2024
    Oldpappy

    Oldpappy A.C. Fults - Curmudgeon at large 2022 Sponsor

    East Tennessee
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    I would replaced that draft tube with a PCV system, because I sometimes ford streams with my Jeeps which I often use for getting to places I like to fish for trout.
     
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