moist gas or fuel pump???

2003 FORD FIVE HUNDRED
123,500 MILES • 4 CYL • 4WD • AUTOMATIC
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SPACYSTACE1970
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I have a 2003 Ford explorer sport trac XLS... when I start it it sputters... then when it is on a minute it will go but the problem seems to be getting worse... took it to auto shop, they changed oil... thought it might be moisture in the gas... I added heat to the tank... did not take care of it... I am now down to a quarter tank, worried that this could be more serious???
Feb 18, 2011 at 3:43 AM
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MJR346
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  • 132 POSTS
  • ASE Certified Mechanic
So problem only happens first couple of minutes and at no other time?

I'd look to see if fuel pump is losing prime or the intake gaskets are leaking.. both common issues on that motor.

Another thing may be a dirty throttle body causing less air than normal to come thru
Feb 18, 2011 at 4:00 AM
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JACOBANDNICKOLAS
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  • 110,194 POSTS
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check fuel pressure and fuel pressure drop off when the key is shut. Directions are on our homepage under the DIY section.
Mar 21, 2011 at 3:20 PM
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