cornet684me,

I recently went through some fuel issues with my 68 Road Runner. New lines, new sender, new sock filter, etc. As the car warmed up I would lose fuel pressure and during my troubleshooting I installed a temporary glass filter and watched it fill up and empty out while running the motor. As it turned out one of my hose clamps holding the rubber hose to the hard fuel line was not quite tight. The clamp was close to the exhaust manifold and when cold everything was fine. As the engine bay heated up the rubber hose got soft enough to let some air in around the hard line and the fuel pump was sucking more air than fuel. I put a second worm clamp at that location and the fuel pump now keeps the filter full at idle.

Go figure...

Jim