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Fuel Smell

Discussion in 'Early CJ5 and CJ6 Tech' started by 1968CJ5, Jun 22, 2005.

  1. Jun 22, 2005
    1968CJ5

    1968CJ5 New Member

    Joined:
    Jun 20, 2005
    Messages:
    10
    I notice that when I come into the garage my CJ smells like gas. I also notice the next day after running the fuel filter is empty. Could my fuel pump be bad and allowing the fuel to leak back? Could this cause the fuel smell? How much do fuel pumps generally run if this may be the case. Also did these jeeps come with a metal enclosed filter...mine is just a plastic one with the screening within.

    Thanks

    1968CJ5
    225
     
    1968CJ5, Jun 22, 2005
    #1
  2. Jun 22, 2005
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
    Joined:
    Sep 20, 2002
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    3,437
    Check all rubber fuel line for cracks. I've had some go bad within 6 months. Others last 15 years, both fuel rated... :? You just can't assume that since the lines were replaced "recently" that they haven't cracked already.

    Yes, fuel pump diaphragm can go bad. It can allow fuel into your crankcase. Best to just replace the fuel pump, they aren't that expensive... maybe $25 IIRC...

    Either of these can lead to a strong smell of gas in your garage. But in addition to that...
    The fuel system in a '68 CJ is "open" , not a sealed system like modern cars. The fuel cap is vented intentionally, enough that you can smell it in your garage. Then if you have either of the above problems, or sloshed some out through the cap vent before you parked it, it can smell even worse.

    Then there's always the possibility of a leak in your underseat tank... ;)

    HTH!!
     
    lynn, Jun 22, 2005
    #2
  3. Jun 22, 2005
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Have you changed the oil recently?

    If you got too much oil out then your fuel pump diaphragm is most likely bad causing the fuel filter to empty into the crankcase. Common to happen on these engines.
     
    sparky, Jun 22, 2005
    #3
  4. Jun 22, 2005
    Roboter

    Roboter Klaatu Barada Jeepto

    Loomis California
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    Apr 13, 2005
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    316
    For pete's sake stop farting in the garage. :D
     
    Roboter, Jun 22, 2005
    #4
  5. Jun 22, 2005
    1968CJ5

    1968CJ5 New Member

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    Roboter you hit the nail on the head. No more mexican for lunch. Thanks guys.
     
    1968CJ5, Jun 22, 2005
    #5
  6. Jun 23, 2005
    Roboter

    Roboter Klaatu Barada Jeepto

    Loomis California
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    Apr 13, 2005
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    ;)
     
    Roboter, Jun 23, 2005
    #6
  7. Jun 23, 2005
    dauntless_powered

    dauntless_powered SUB COB 2024 Sponsor

    Groton, CT
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    i had a small leak in the underseat tank onmine, little pin hole size. not enough to even shopw wetness on the floor boards. the very strong smell led me to investigate and whne i pulled the tank there was wetness under it
     
    dauntless_powered, Jun 23, 2005
    #7
  8. Jul 31, 2005
    Liveinaz

    Liveinaz New Member

    Phoenix AZ
    Joined:
    Jul 27, 2005
    Messages:
    22

    I think I have this problem!!! When I drained my oil, there is a strong smell of gas and there was about 6 quarts of oil that came out!!! Do i need to change the entire fuel pump, or can you just change the diaphram? Are these pumps expensive? Do they still make these? Oh no, I think I am heading into some unplanned work!!!
     
    Liveinaz, Jul 31, 2005
    #8
  9. Aug 1, 2005
    blevisay

    blevisay Oh Noooooooooooooooo! Staff Member

    Portland Tn.
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    Krage has them.....cheap.......HTH
     
    blevisay, Aug 1, 2005
    #9
  10. Aug 1, 2005
    Liveinaz

    Liveinaz New Member

    Phoenix AZ
    Joined:
    Jul 27, 2005
    Messages:
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    I just bought the fuel pump from Krage...I hope this takes care of the blue smoke too..I think that because the oil was soooo diluted with gas, that it was seaping into the cylinders and burning...Thanks for your help.
     
    Liveinaz, Aug 1, 2005
    #10
  11. Aug 1, 2005
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
    Joined:
    Sep 10, 2003
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    2,084
    can't be as bad as mine had w/oxygen hose for gas line. IF the filter is not below the tank, the gas will run out of it.
     
    66cj5, Aug 1, 2005
    #11
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