Duel fuel pump test?

[batkins761]

I have a 1988 ProV150 with duel fuel pumps. I have tested them blowing and sucking on the inlet and outlet and they seem to be functioning ok.<br /><br />Is there any way to test that the crankcase port that operates the pump is working ok? I wonder if it's clogged or anything. Alternatively, is there a fuel flow test I can do?<br /><br />I am isolating a fuel problem and wanted to check the pumps before striking out on a carb rebuild, which is probably next on the list.<br /><br />Thanks!<br />Brian Atkins