New Fuel Pump / Pump Doesn't Prime

With a newly installed fuel pump, or after disconnecting the fuel lines for maintenance, The pump does not prime or has run a long time before building pressure again. 

These are symptoms of the same problems outlined in question number 3 above.  Cracking the line connected to the pump inlet, then the line connected to the carburetor or fuel rail may help purge air.  Briefly cycle the pump but be careful to avoid fuel leaks and prevent fire hazards when handling fuel!