Mechanical pumps will do that. Your return line might be plugged up.
2026-06-30 14:27:52
3
jamesmitchell1971 :
vent line is plugged
2026-06-29 23:17:41
28
11th hour :
purge valve bad .pressure can cause a gas fume fire from static on your clothing 💯
2026-06-30 07:13:20
0
Johnny jump :
I remember that cap. 72 Skylark
2026-06-30 12:03:28
5
Bobcarlover :
GM had cars with non vented gas tanks for instance the 1970 Corvette, came with a non-vented gas cap and a return line from the fuel pump.
2026-06-30 18:00:00
0
dangit427 :
Vent ain’t venting.
2026-06-30 23:40:50
2
Blue_Dragon :
you should get a locking gas cap anyways
2026-06-30 15:45:53
2
Tres Amigos :
65 GTO
2026-06-30 11:32:21
3
David Mech325 :
vapor lock
2026-06-30 13:40:24
0
dub74 :
It's got blowby😄
2026-07-01 02:19:34
1
stopmakingbullets :
Get a new cap or put a small hole in the cap until you get another vented gas cap
2026-07-01 01:17:05
1
Joe Valdez :
Just get a vented cap. Had the same thing happen with my Chevelle
2026-07-01 11:52:28
1
dondean525 :
Radiator cap
2026-07-01 03:37:24
0
chevelle :
Normal 😎 keep on truckin
2026-06-30 15:22:15
1
Davemon :
Upper that is going to be expensive to fill 🤪
2026-06-30 18:58:16
1
user3717276738556 :
That brings back fond memories .
2026-06-30 16:13:56
1
coreylee :
get a vented cap
2026-06-30 00:49:15
7
scottlair123 :
just put a vented cap on it. problem solved
2026-06-30 19:41:49
5
Johnny Williams :
65 GTO
2026-06-30 17:11:54
1
here we go :
65 Goat
2026-07-01 09:06:17
0
Shadow :
Don’t tighten it all the way
2026-07-01 16:10:42
0
71lsxchevy :
Check the breather line going to the tank. It probably got clogged with fuel. You can unplug it and it’ll drain the clogged fuel. It won’t be much at all
2026-07-01 14:54:31
0
michael_is_carson :
Need vented cap
2026-07-02 05:57:19
0
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