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Remove the lever inside the WUR (the one with the heating element), put the WUR back together and see if that makes a difference. Hook the gauge up, fire up the fuel pump, and if your cp reads within warm range now, then your cold CP is way out of wack and it's time to tap the post upwards. By doing this you're simulating a warm engine, and this will confirm what your warm control pressure currently set to.
I would double check the size of the O-ring that was replaced, if it's thicker than the original, it could also cause a drop in control pressure as described.
So if after you do the above the cp is still at 0, try adjusting the allen screw (the one shown in post #3). If that allows you to get the warm cp within range, then reinstall the lever with the heating element and now adjust the cold control pressure. If the cold cp is still reading 0, then take the WUR back apart and tap the post upward.
The warm cp and cold cp adjustments are tied together to a certain extent. You can never adjust your cold cp to read lower than your warm cp.
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Raymond
1979 928 5 spd
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