fuel pressure

[jjwjr@ix.netcom.com (JEREMY J. WALTERS JR.)]

I hae a cold start problem with my 86 5kcst.  I think it gas to do with 
the fuel system not holding any pressure when engine is shut off.  It 
will start fine if I run the fuel pump before starting.  I have checked 
the fuel pump hek valve, it holds fine, the accumulator does not have 
fuel pn the wrong side of the diaphram when I remove the screw, and the 
old start valve does not leak.  That leaves me with the system pressure 
regulator, or what else?  How do I determine if the injectors are 
leaking, or the system pressure regulator.  My Bosch manual talks about 
the O-rings for the regulator push-valve in the fuel distributor.  Are 
these replaceable?  I have a pressure guage I made, but it only has the 
fittings for my Jetta's K-Jet system with flare fittings on the control 
pressure line.  I guess I need to get some to fit the banjo fitting on 
the Audi.  I am just wondering if any of you out there have had a 
similar experience.