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I have a 92 Dodge Dakota. I just replaced the fuel pump and filter and these did not fix the problem.

PROBLEM: When the truck sits overnight, I have to turn the ignition key to run and wait for 20-30 seconds for the fuel pressure to build. Then the engine is rough starting for 5 seconds while I pump the pedal. Then it runs fine.

What is going one here?

Thanks
 

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Sounds like you have a hole in a fuel hose somewhere and it is not keeping prime. Look around under it after it has been sitting for a while and hopefully you can see a wet spot. That happend to me on my old Cutlas on the return line, since it is not under pressure it was hard to find.
 

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Same thing happened to me, only the leak was after the pump, but stll inside the fuel tank (basically the flexible hose from the pump to the fuel sending unit). Because the leak was inside the fuel tank, there were no smells, no lost fuel, and no external drips. I'd have to say thats your problem, otherwise look at your pressure regulator and/or fuel pump relay.
 
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