My gas tank doesn't seem to vent anymore and I'd like to fix it while I'm messing with some other stuff. Its been a real problem now that its in the garage with the fuel lines removed from the rail (head and all is off). The pressure is causing fuel to come out the lines and go on the floor and the fumes are getting into the house somewhat and its unberiable to work in sometimes. Currently I have the fuel cap off to vent that way but there are still slight fumes sometimes. Is there a charcoal canister and where at? Lines for venting, etc? Last thing I need while driving is risk of tank puncture wether from accident or trail riding, and go boom.

My gas tank doesn't seem to vent anymore and I'd like to fix it while I'm messing with some other stuff. Its been a real problem now that its in the garage with the fuel lines removed from the rail (head and all is off). The pressure is causing fuel to come out the lines and go on the floor and the fumes are getting into the house somewhat and its unberiable to work in sometimes. Currently I have the fuel cap off to vent that way but there are still slight fumes sometimes. Is there a charcoal canister and where at? Lines for venting, etc? Last thing I need while driving is risk of tank puncture wether from accident or trail riding, and go boom.

What you're describing is normal. When you have the fuel lines disconnected, the gas will expand when warm and 'bubble up' out of the feed line. Once you get the system back together, I bet it'll be fine. In the meantime, loosening the gas cap is a good idea. You can also cap/plug the feed and return line with the cap loose.

-Eric

Quote from: yellow2000S/R on December 22, 2009, 06:25:08 AM

My gas tank doesn't seem to vent anymore and I'd like to fix it while I'm messing with some other stuff. Its been a real problem now that its in the garage with the fuel lines removed from the rail (head and all is off). The pressure is causing fuel to come out the lines and go on the floor and the fumes are getting into the house somewhat and its unberiable to work in sometimes. Currently I have the fuel cap off to vent that way but there are still slight fumes sometimes. Is there a charcoal canister and where at? Lines for venting, etc? Last thing I need while driving is risk of tank puncture wether from accident or trail riding, and go boom.

What you're describing is normal. When you have the fuel lines disconnected, the gas will expand when warm and 'bubble up' out of the feed line. Once you get the system back together, I bet it'll be fine. In the meantime, loosening the gas cap is a good idea. You can also cap/plug the feed and return line with the cap loose.

-Eric

Its been pressurized for years, having all those vapors come out in a loud hiss doesn't seem the safest... Are there no vents running to a charcoal canister then to atmosphere with a drainback to tank?

no, the tank has to pressurize before it will release vapor to the canister. the amount of pressure is high enough to force the fuel out the open lines at the fuel rail..... this is normal for any post 1972 vehicle. THIS IS WHY A HOME WITH A GAS HOT WATER HEATER OR FURNACE IS NOT A AUTO SHOP.