I'm in chas sc, it was 74 degrees today so it couldn't be ice. Its an electric fuel pump. I went to remove the fuel filter and started with the end towards the engine. I noticed a lot of pressure release (air or vapor). the bowls had fuel in them and the line leading from the pump to the filter had fuel in it but not a constant stream fuel....air....fuel and then constant fuel. My fuel line is rather close to my header at one point (within 3 to 4 inches). Could I be vaporizing the fuel in the line causing pressure to build greater than the pump psi performance????

the vehicle is a 94 s10 with a sb 355 with holley 650 double pumper.

thanks