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Float test question

Discussion in 'XJ Technical Chat' started by jvitzu, Jun 10, 2010.

  1. jvitzu

    jvitzu Member

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    I feel dumb for asking this, but its been bothering me:

    When I'm doing a float test with a clear tube, I move the tube up and down. Lets say I've moved the tube in such a way that the entire foot-length of it is filled with fuel. Then, I raise the tube so that almost all of it goes back into the carburetor. Where does that fuel go? Does it spill out of the carb into the manifold/intake?
     
    jvitzu, Jun 10, 2010
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  2. TIMEtoRIDE

    TIMEtoRIDE Active Member

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    NO, it simply over-fills the float bowl chamber, and shuts off the needle/seat.
    You only get a true reading if you do not move the clear tube.
    The extra fuel would induce a slight error. Drain and re-fill.

    Carl Sagan had some great ideas !
     
    TIMEtoRIDE, Jun 10, 2010
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  3. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    You can move it around a bit, but TIME is right, you don't want to do what you described you will get a false reading.
     
    bigfitz52, Jun 11, 2010
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  4. jvitzu

    jvitzu Member

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    Well noted, thanks. I'd better start over heh.
     
    jvitzu, Jun 11, 2010
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  5. MiCarl

    MiCarl Active Member

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    This situation may be the reason the service manual specifies to check the level with the engine running.

    It's also important to have no air in your fluid column as it will interfere with your reading.
     
    MiCarl, Jun 11, 2010
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