Hi Allen,
I queried Holley's tech line and they came up with YAS (yet another suggestion):
QUOTE:
From:
fuelpumps@support.holley.com
the pressure should not rise when the fuel pump is not running. is the pump still running when the engine is off? which pump is he running?
thank you
ENDQUOTE
Hope that helps
Tom
PS: Even if this is off-target you may want to e-mail them some further questions