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Old truck, swapped motor to a 455 big block, having vapor locking problems, any suggestions?

Tiny
KBYRACING
  • MEMBER
  • 1975 CHEVROLET CHEYENNE
  • 210,000 MILES
I can easily work on this truck, just a little short on time and money, any suggestions that don't involve moving the fuel line, or pushing it off a cliff?
Saturday, September 3rd, 2011 AT 5:38 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If its actually vapor locking-seal the fuel pump area and see if it helps
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Saturday, September 3rd, 2011 AT 10:58 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
A true vapor lock is the fuel boiling due to being too close to a heat source. I doubt that is really your problem. It's much more common for a mechanical fuel pump to suck in air due to a porous fuel line somewhere between the pump and the tank.
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Saturday, September 3rd, 2011 AT 12:14 PM
Tiny
KBYRACING
  • MEMBER
  • 4 POSTS
I know exactly where my problem is, just don't have the time or money to move the fuel line, it has an electric fuel pump that I have had pressure tested, so I know it's a true vapor lock, would wrapping my exhaust manifold help? Or make my problem worse?
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Monday, September 5th, 2011 AT 7:19 AM

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