Why won't my truck start without moving relays

I have Dodge dakota st 2006, when I stop 2 or 3 times, and try and start it it seems like its not getting gas, so I move relays in fuss box around then it's OK, so what needs to be replaced so this will not happen.

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@joallgood which relays are you moving around? could be that you have a bad fuel pump relay....

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