The FI return line attaches to the fuel tank with a 5/16" compression fitting that I can't get a good seal on. I even replaced the tube section and of course used a new compression sleeve. I've tightened it quite a bit, but it still weeps. It so little that it probably wouldn't matter if it were an external tank. However, this tank is mounted in the trunk (Boot that is-- it's an older Jaguar), and the fuel odor is a problem.
Any ideas? Rule of thumb for tightening these fittings?
TIA
Ed