Quote:
Originally Posted by 68gmsee
Re. weak pump. I had a similar issue with my 69 truck. It would run okay for a while and then die out. Pump did the same thing yours is doing. Pump a little gas into a jar and then it trickled down. I replaced the pump and found the old one had a small crack in the diaphragm.
Few years later I had a similar symptom on my 68 and figured I would be smart and replace the pump right off. Wrong! Turned out to be a restricted fuel line from the tank to the fuel pump. Made a new one and that solved that problem.
Other fuel problems I've had were restricted fuel filter sock inside the fuel tank and unvented cap in fuel tank.
Below is a pic of a vented cap so you can tell the difference. You can gently insert a thin object and push on the inside piece. It's spring loaded and should move up and down slightly.
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Thanks for the help. I was able to see that my fuel cap does not have a vent on it.