My Willys 3A and 3B Community

3A, 3B, DJ Technical Knowledge Base => "Original"-- Technical Questions, Answers, Observations => Topic started by: beefspots on November 09, 2010, 11:07:11 AM

Title: fuel bleeding off
Post by: beefspots 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

Title: Re: fuel bleeding off
Post by: Carls_jeep on November 09, 2010, 06:14:54 PM

How do you know fuel is disappearing from the fuel line?

Title: Re: fuel bleeding off
Post by: Bob W 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.

Title: Re: fuel bleeding off
Post by: rocketeer 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

Title: Re: fuel bleeding off
Post by: bayo500 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...

Title: Re: fuel bleeding off
Post by: beefspots on November 11, 2010, 09:19:41 AM

my in line fuel filter is clear plastic and I am having starting issues.

Title: Re: fuel bleeding off
Post by: Carls_jeep on November 11, 2010, 07:13:08 PM

Can you give more details about the starting issues and the fuel filter?

Title: Re: fuel bleeding off
Post by: beefspots 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

Title: Re: fuel bleeding off
Post by: Bob W 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