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I have a 99 f250 light duty 3/4 ton and while driving it,it just died on me. It would turn over but it acted like it wasent getting fuel. After droping the tank and pluging up a new fuel pump i still did not have any power to my pump. I used a test light to make sure i had power to the pump and i did according to the test light. I then had a friend move the relays that are located under the driver side dash and the pump kicked on. I then put new pump in the tank being asi already had the tank on the ground and started removing the fuse and relay base. The female spades that the relays plug into were loose. We squeezed them toghter with some pliers and as soon as i get a chance im gonna reinstall the fuse box and try it. I think this was my problem.( loose relay connection) .

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Q: Why does F250 lose fuel pressure If the fuel pump is replace and symptoms still occur what else could the problem be?
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