Charcoal Canister Delete Questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**hatzie** · 11-24-2019, 08:49 PM

If one tank is overflowing the return lines off the tank switch valve are hooked up backwards... the fuel is being returned to the tank that's not in use. Fix this ASAP before you have a fire.

The fuel tank vent lines should route to the charcoal canister. Really no reason to delete the charcoal can. It keeps the barn from smelling like gasoline and it doesn't cost any HP to keep it in working order.

Someone tied the tank vents to the front axle vent... Your axle vents should terminate in a vent cap. Rear is a hose with a vent hooked on the bottom of the bed. I've never seen a front vent that's hooked up in the original location. I run mine up to the frame and terminate with a vent fitting near the top of the frame.

I'd check to make sure whomever borked the hose routing didn't hook the tank vents to the transmission and transfer case to fill them with gasoline.

11-24-2019, 08:49 PM	#3
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 5,049	Re: Charcoal Canister Delete Questions If one tank is overflowing the return lines off the tank switch valve are hooked up backwards... the fuel is being returned to the tank that's not in use. Fix this ASAP before you have a fire. The fuel tank vent lines should route to the charcoal canister. Really no reason to delete the charcoal can. It keeps the barn from smelling like gasoline and it doesn't cost any HP to keep it in working order. Someone tied the tank vents to the front axle vent... Your axle vents should terminate in a vent cap. Rear is a hose with a vent hooked on the bottom of the bed. I've never seen a front vent that's hooked up in the original location. I run mine up to the frame and terminate with a vent fitting near the top of the frame. I'd check to make sure whomever borked the hose routing didn't hook the tank vents to the transmission and transfer case to fill them with gasoline. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.



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