Dear Randy;

One is comming from the pump & the other may be via the crank. The larger volume/pressure overwehlms that when running.

With the filter installed, spin the pump till there's a 30# reading on your guage. Then (distributor in) spin the engine (plugs out) till there's a reading to be sure etc.

Filling the filter first, helps too.

Good luck. \:\)

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon