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Author Topic: Vapor canister filliung up with gas.  (Read 2486 times)

Offline chevytruknut

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Vapor canister filliung up with gas.
« on: July 23, 2011, 04:41:48 pm »
Has anyone out there ever had raw gas pour out of the vapor canister? I have an 87 silverado 350 tbi. It only does it in very hot weather and I mean gas pours out with engine running or not. If I remove the gas cap it stops so i tried a new cap, but no difference. If I ever have problems they are always head scratchers.
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Offline VileZambonie

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Re: Vapor canister filliung up with gas.
« Reply #1 on: July 23, 2011, 04:46:31 pm »
Plugged vent or solenoid or hoses are incorrectly routed.
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Offline 1979C20

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Re: Vapor canister filliung up with gas.
« Reply #2 on: July 23, 2011, 04:47:13 pm »
Sounds to me like your tbi might need a rebuild. Fuel was leaking out of my carb into onr of the vacuum lines and ended up leaking fuel into my oil through the pcv valve. I had to cap the vacuum line. Is the vent line on your sending unit hooked up and not plugged? You could try a vented gas cap.
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1979 SCLB C20 Q-jet 350 SM465 14b F.F. 4.10 G80
1989 GMC Suburban V2500 TBI350 TH400 4in lift 35's 14b SF
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