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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Bad fuel pump?

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Old Sep 2, 2010 | 10:25 PM
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captwdhall
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Bad fuel pump?

I have a '96 F-150 4.9 and am having a problem with the front tank. When I try starting my truck first thing in the AM using the front tank, starts right up. If i was to turn it off and start it again, it acts like it's not getting fuel. flip over to the rear tank, starts right up. I can then start driving and switch back over with a little hesitation, but it works 9 times out of 10. I also feel like the truck lacks power when i'm pulling from the front tank. When im on the rear tank, i can almost smoke the tires. also, the check engine light is on. Autozone says its either the mass airflow sensor, or an O2 sensor.

Can anyone help me?
 
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Old Sep 2, 2010 | 10:29 PM
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oh yea, one more thing. If i fill up the rear tank, and leave the front half full, by the time i use up all the fuel in the rear tank which seems to go very very quickly, i can switch over to the front tank, and it will be full. I cant figure that out either!

Thanks
 
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Old Sep 2, 2010 | 11:05 PM
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jplinville
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Fuel tank selector valve...

If you do a search on this forum, you'll see that this is a common issue.
 
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Old Sep 3, 2010 | 08:24 AM
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Would that account for the me being able to hear the rear tank running, but not the front? Replacement tips?
 
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