Yet another gas tank probelm

dusterdon said
When I bought my aftermarket fuel sender, it came with a return line hose barb. I hope you have plugged this if you have one. I modified my gas cap to vent pressure with the small holes. Have had zero problems in two years, but we don't go autocrossing. Works fine for going straight. Gotta do something if you have an electric pump.

I'm running the vent line to the charcoal canister and engine vacuum to to the canister. That set-up keeps the tank from building too much pressure when running. Obviously it's not doing any good with the car shut off. The return line has been capped. I'm hesitant to drill vent holes in the cap, because I don't want anymore fuel fumes in the garage than I already have. I need to make a trip to the radiator shop to address cooling issues, so I may just drop the tank and take it along also.