Leave the cap off and run it. Put the old one back on and see if it corrects the problem. Visually, you should see a way for air to escape the cap to the outside. That has never been a problem for me (vapor lock). Brain freeze yes, Vapor lock no.


Deve

1950 Chevy 3100 Deluxe Cab
1950 Chevy 3100 Standard Cab
In the Stovebolt Gallery
The Think Tank
More info and tips at Deve's Technet