1979, 400 fule pump problem
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New User
Joined: Aug 2005
Posts: 16
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From: Longmont, CO
1979, 400 fule pump problem
I put an edelbrock intake and 4 barrel carb onto the motor last year. It was running really rich so I put some smaller jets into the carb and have not had that problem since.
Now for the problem that I am having. I decided to upgrade to an electric fuel pump. I went with a 4-7 psi pump first and that was to weak, It would idle fine but as soon as I got on the gas it would die. So I went with a 5.5 to 10 psi pump and it now runs just fine.
The problem that I have is when I go off roading in the mountains. I was heading up, it wasn’t to much of an incline, and the truck died. I could hear the pump trying to pump but there was no fuel up at the filter. I then tried to take the cap off , still not change. The truck was leaning a little to the passenger side. It had a full tank. I tied to hook up the mechanical pump, as it is still on the engine, but was still unable to get fuel up to the carb.
I ended up having to push the truck backward down hill to get to flatter ground to turn around and go home. I have never had the problem since but I have not gone off roading because I am worried that it will do it again. <O
</O
Anyone have and suggestions to try or reasons why this may happen. I may just go back to the mechanical pump.<O</O
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Now for the problem that I am having. I decided to upgrade to an electric fuel pump. I went with a 4-7 psi pump first and that was to weak, It would idle fine but as soon as I got on the gas it would die. So I went with a 5.5 to 10 psi pump and it now runs just fine.
The problem that I have is when I go off roading in the mountains. I was heading up, it wasn’t to much of an incline, and the truck died. I could hear the pump trying to pump but there was no fuel up at the filter. I then tried to take the cap off , still not change. The truck was leaning a little to the passenger side. It had a full tank. I tied to hook up the mechanical pump, as it is still on the engine, but was still unable to get fuel up to the carb.
I ended up having to push the truck backward down hill to get to flatter ground to turn around and go home. I have never had the problem since but I have not gone off roading because I am worried that it will do it again. <O
</OAnyone have and suggestions to try or reasons why this may happen. I may just go back to the mechanical pump.<O
</O<!-- / message --><!-- no sigs except when logged in -->
Thread Starter
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New User
Joined: Aug 2005
Posts: 16
Likes: 0
From: Longmont, CO
I cut into he fuel line right on the drive rside frame rail right in front of the tank. I am thinking about going back to a good machincal pump. I was just wondering what may cause this. Thanks for the reply.
