[lonewolf]

Undo the connection at the WUR that comes from fuel distr.
On end of your tester threads onto WUR and the other end goes onto the line that you just removed from the wur.
ON your 1980 with cold engine and everything hooked up ands valve in the open or inline position. start engine . pressure should show approx 25lbs and slowly move up within 3min to 50. Once there crank the valve on your tester to the closed position. then engine should almost stall.if alls well you should see 70lbs. open again .