Fuel pressure dropping while driving and under acceleration to zero at idle runs 4 lb electric Blue

flathead31coupe said
I have an electric Holly blue fuel pump close to the tank with a hundred micron and a 10 micron stainless steel screen filters. Both are clear. Have been noticing when driving from stoplight to stoplight fuel pressure drops to nearly zero. When I let up and come to an idle it goes back up to 4 lb. 3/8 supply and return to the tank ideas welcome

Had that happen at the track and saw it on the data logger for each run. Turned out to be a loose connection at the relay that would just pull away with acceleration and return to make contact when I slowed down. Had many runs where it went to zero many times but only found it by accident after I pulled the motor.

Check every connection