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Running Jaz 15 gallon aluminium rear sump fuel cell (has the foam in it)
A1000 Fuel pump

I have 8 ft long an8 vent line with 1 loop in the line with roll over valve off the tank Vent is the front right corner of tank

Fuel still dumps of a little fuel with loop.

I noticed that cap was hard to remove after running it at track.
After pressure bled off got tank open and saw alot of bubbles in tank.
Fuel tank it was cool to the touch, the fuel is was warm but not hot.
Thinking that loop is not allowing fuel to vent?

But i need to the loop to not dump fuel

any ideas???
 

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Like a sink trap, if fuel is in the bottom of the loop, there will be no air flow. Raise the vent so fuel cannot get to the loop.
 
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