Fuel out the venting

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Layne02

Full Access Member
Joined
Dec 5, 2015
Posts
122
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11
Location
Ga
First Name
Jeff
Truck Year
1987
Truck Model
R1500
Engine Size
305
Working on my 87. Rebuilt Holley performer carb cause it was all gunked up inside. Its got a Carter external pump on it snd Im trying to set the pressure regulator because I cant get it to go above 3psl. Anyway im getting fuel shooting out of the front vent tube, BUT, Im not getting any fuel to come out of the sight window( hole). How is that possible?
Oh, this happening just turning pump on, not running
 

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