did you change gas tank caps when this started? If there isn't a vent on the tank (or if it's plugged up) and you run a non-vented cap it will cause a vacuum in the tank as the level drops and the pump will not be able to pick up fuel. You can usually tell if this is the issue by removing the gas cap slowly after this happens and hearing the "whoosh" sound of air being sucked back into the tank when the cap loosens. Bottom line, the tank either needs a separate functioning vent, or a vented cap.
The other thing that could kill the pumps is a restrictive filter before the pump; I run a 100 micron before the pump then the normal 10 micron or whatever after; electric pumps cannot suck through a restrictive filter, but it isn't an issue to push through it (after the pump). Your pump isn't mounted next to the exhaust or similar, and getting cooked, right?
Your problem sounds like a tank vent issue to me though.
Jody
Last edited by camcojb; 08-10-2008 at 08:28 AM.
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