[Dan Stryffeler]

I had a problem with my Holley red pump also; no noise when I switched it on... after I took it off the car and checked it on the bench I found that it was spinning, just no clacking noise - I wacked it with a rubber mallet and it started up with the usual racket.

When I took it apart I found that the impeller blades aren't fixed, they slide out against the housing from centrifugal force. Apparently mine had gummed up and were stuck somewhat retracted. I cleaned it all out and was tempted to put it back on the car but chickened out and bought a new one which has been working fine.

Well, not exactly fine, the fuel pressure seems to vary quite a bit from 5 to 7lbs depending on engine rpm but Holley tech says this is normal.

- Dan