My car leaks gas if it has over a half a tank. After driving it just drips and drips. My car guy thinks its the vent line plugged and forcing gas out. I know a hole is the easy answer but I changed tanks before and the leak is coming from somewhere above what I can see from below. anybody else had this problem with there sending unit.

 

Never had the problem, but it could be the fuel tank filler neck is cracked at the tank connection, or the gasket at the tank pump/sender may be bad.

 

The fuel fill tube is up hi on the tank and i can see the bottom of it. I gonna pull the tank down and check it. I wanted to know about the plugged vent line.

 

Take off the gas cap and see if it quits. If so, it's a vent problem. If not, it's a hole/crack/leak/etc.