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Offline beefspots

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fuel bleeding off
« on: November 09, 2010, 11:07:11 AM »
fuel disappears from line between carb and pump when sits overnight.  Is this a fuel pump problem or Carb problem?  If a pump problem can I just replace a Check valve or something in fuel pump?  any help would be appreciated.

JW
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Offline Carls_jeep

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Re: fuel bleeding off
« Reply #1 on: November 09, 2010, 06:14:54 PM »
How do you know fuel is disappearing from the fuel line?
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Offline Bob W

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Re: fuel bleeding off
« Reply #2 on: November 09, 2010, 07:16:34 PM »
What condition are you trying to correct? I don't think a lack of fuel in that line overnight will cause any noticeable problems.
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Offline rocketeer

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Re: fuel bleeding off
« Reply #3 on: November 09, 2010, 11:15:54 PM »
Quote
How do you know fuel is disappearing from the fuel line?
That would be my question, how do you know? Second question, are you having a starting problem in the morning?

Larry
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Offline bayo500

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Re: fuel bleeding off
« Reply #4 on: November 11, 2010, 06:23:07 AM »
Mechanical pumps with a glass bowl have a large diaphragm and two small valves, either the diaphragm has a small tear in it and the fuel is leaking into your sump overnight or one of the valves has come loose or is damaged, try a  new kit...
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Offline beefspots

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Re: fuel bleeding off
« Reply #5 on: November 11, 2010, 09:19:41 AM »
my in line fuel filter is clear plastic and I am having starting issues.
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Offline Carls_jeep

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Re: fuel bleeding off
« Reply #6 on: November 11, 2010, 07:13:08 PM »
Can you give more details about the starting issues and the fuel filter?
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Offline beefspots

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Re: fuel bleeding off
« Reply #7 on: November 12, 2010, 10:57:05 AM »
just a regular old clear plastic in line filter and it will start good and run for about a min. or so then  dies.  then I have a hell of a time getting her started again.  if I manually pressurize system with my mouth she will start.  

Josh
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Offline Bob W

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Re: fuel bleeding off
« Reply #8 on: November 12, 2010, 11:08:18 AM »
Does sound like you are having a fuel supply problem. Often times junk clogs up the fuel line from the tank to the pump on these old Jeeps. This web-page explains how to test the fuel pump. http://www.cj3a.info/tech/fuelpump.html
« Last Edit: November 12, 2010, 11:09:15 AM by Bob_W »
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