10-06-2006, 09:07 AM
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Senior Club Cobra Member
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Join Date: Aug 2001
Location: Rocky River, Ohio,
OH
Cobra Make, Engine: Everett-Morrison, 347 Tri-power Stroker
Posts: 678
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Not Ranked
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
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