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[T3] FI fuel pump problems

I'm having fuel pump problems that I just haven't been able to figure out. 

I've got a fuel pump which spins, but doesn't put out any flow or pressure. 
There actually IS flow out the overflow line, but not out the output line. And 
even when I pinch off the overflow line I don't get any output.

This is driving me nuts, because the problem comes and goes, so sometimes I 
think it's "fixed" even though I don't know what I did to fix it.

Now I've had the pump head apart and everything that I can see appears to be 
okay. I have NOT taken the little crimped cap apart, however, so I'm wondering 
if the rubber tip of the check valve has come loose from the plunger. I don't 
know if I've ever seen what this is supposed to look like inside, but I can see 
the end of the plunger by prying it back with a small screwdriver. 

What I see looks rather long, thin, and pointy, maybe 3mm dia and 6mm long. Is 
that just a central mounting spike for the real rubber seal?

I'm trying to avoid removing the crimped cover on those springs and valves, 
because I'm not sure I can crimp it again successfully.

If this starts to become a problem, I think I'd like to come up with a fix that 
just removes the check valve function from the pump body and substitutes a 
separate in-line check valve. Anyone know of a supplier of inexpensive 5/16" in-
line check valves that would be compatable with gasoline?

Jim Adney
Madison, WI 53711-3054

List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org

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