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Old January 31st, 2019, 02:03 PM
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ilvracn ilvracn is offline
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Join Date: Nov 2013
Location: atlantic iowa
Truck: 1966 gmc 1500
Age: 59
Posts: 215
Rep Power: 123
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Default Re: 1966 And Later Fuel Pumps

i still had my old pump laying on the bench from this summer when it went bad. i decided to take it apart, and see what went wrong. one of the check valves fell out. i was driving at hiway speed, i think the vibration from 3400 rpm probably vibrated the valve from it's seat in the pump. diaphram looked excellent. looks like manufacturer defect, should have been staked in.
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