Fuel system will not hold prime - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 04-29-2011, 03:49 AM Thread Starter
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Fuel system will not hold prime

I replaced the fuel pump a few months ago because of a leak in that area, thought that was it. With diesel high the truck sits all week until I use it on the weekends. Wehn sitting all week, it takes awhile to get it running. It seems the fuel is draining back into the tank each time because when first turning over hte engine theres no smoke and combustion. As I keep trying you can see it building up then takes off, but will almost kill my battery doing so.. Its pretty warm here so I am sure its not cold. I also replaced all the rubber fuel line between the pump and the filter. Could it be the pump?
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post #2 of 5 Old 05-07-2011, 10:22 AM
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Originally Posted by Nick8564 View Post
I replaced the fuel pump a few months ago because of a leak in that area, thought that was it. With diesel high the truck sits all week until I use it on the weekends. Wehn sitting all week, it takes awhile to get it running. It seems the fuel is draining back into the tank each time because when first turning over the engine theres no smoke and combustion. As I keep trying you can see it building up then takes off, but will almost kill my battery doing so.. Its pretty warm here so I am sure its not cold. I also replaced all the rubber fuel line between the pump and the filter. Could it be the pump?
I don't know how good you are with powerstrokes...so I don't mean to insult your intelligence. When you did the fuel pump, did you take it out for a ride at mid-high rpm (like highway driving with OD off) for a half hour or so? It takes awhile for all the air to be purged from the system after a job like that...
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post #3 of 5 Old 05-08-2011, 12:46 AM
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year?

do you have anymore FUEL leaks?
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post #4 of 5 Old 09-25-2013, 05:49 PM
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hey,
i think i have a similair problem.
truck takes at least 20 sec to start, but if i shut her right down and try again its a lot faster. if i press that little valve on the fuel bowl it had lots of pressyre when running. after shutting down its gone right away....
Did you find what your problem was?

mine is 95 i didnt put any km on yet since im fixing it up right know.
dont know about any new parts fuel filter is replaced and the tanks.
is has 230km on it.

thanks
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post #5 of 5 Old 10-12-2013, 11:26 AM
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I believe there is a check valve inside the electric pumps. I'm not sure about the mechanical pumps, but there is a check valve somewhere obviously. Is there fuel in the fuel bowl after a engine shut down, or does it all go back into the tank?
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