<VV> fuel pump issue

[shortle]

-----Original Message-----
>From: Garry Parsley via VirtualVairs <virtualvairs at corvair.org>
>Sent: Nov 12, 2014 4:25 PM
>To: virtualvairs at corvair.org
>Subject: <VV> fuel pump issue
>
>Hey gang,
>
>After 8 months of work I’m finally at the start it and adjust stage on my 66 Monza, but am still having an issue. When I put a little gas in each carb, it fires right up, then dies. A definite lack of fuel issue. The original pump was leaking, so I ordered a new one. While waiting for it, I read the tech guide articles about the wrong length stem coming out of the pump on the newer versions.  The original pump was 1/4” long, so I checked the push rod. It wouldn’t come out, so I ended up removing the rear housing, and found the end of the rod mangled. The “too long” shaft now made sense. Have now replaced the sending unit, hoses, fuel pump, push rod, eccentric. The new pump’s shaft was 9/32” long, so I cut it down to 7/32” but it hasn’t helped. I’ve verified fuel to the pump, but when I crack the lines at the carbs and crank it – dry. My question is – is it possible the rod in the pump is still too long at 7/32” sticking out? Could this be keeping the diaphragms from doing their job?  I didn’t want to risk cutting too much off, but will listen to all suggestions. I fear I may have tunnel-vision at this point, and would appreciate some input.
>
>Garry parsley
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Hi Garry, This sounds interesting. One time I could not get a new pump to work and what I found was my eccentric was not tight on the crankshaft. When I cranked the engine over with a phillips screwdriver in the center of the rod I could not feel the rod going up and down. So I removed the rear cover and found the spacer on the crankshaft was cracked/broken which allowed the eccentric to "wobble" but not push the fuel pump rod. As I recall a bunch of stuff was mangled in there including the eccentric, spacer, distributor drive gear (brass), the woodruff key,push rod, etc.  I never forgot this. I hope this is helpful. Another thing, did you stake the valves in the new pump? I have heard of them not being tight.
Timothy Shortle in Durango Colorado 81301