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1986 Ford Bronco, 351w with edelbrock aluminum top end and holly 600.
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2,286 Posts
Discussion Starter #1
Howdy - anyone know why I couldn’t use the vapor return line for a fuel return line to the tank? What is on the tank side? Filter? Check valve?



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78 Custom 351M NP435 NP205 Sniper EFI Hedman Headers Magnaflow Muffler 4.56 Gears Grizzly lockers
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1,838 Posts
I believe the valve at the top of the tank is a check valve. I think I've heard it referred to as a rollover valve. Other than that, I think the vent line is too small in diameter as well. Are you adding EFI?
 

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Addicted to Junk
85 Bronco, 309ci I6 w/4bbl, np435, 4" lift, 37" Irok NDs, 4.56 w/ Detroit Locker and tru trac
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12,318 Posts
Too small and not rated for pressure. Being so small, the incoming pressure would rise as it entered the small tube.

Id just run a new line
 
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