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Moist gas or fuel pump?

Tiny
SPACYSTACE1970
  • MEMBER
  • 2003 FORD FIVE HUNDRED
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 123,500 MILES
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?
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Friday, February 18th, 2011 AT 3:43 AM

2 Replies

Tiny
MJR346
  • MECHANIC
  • 132 POSTS
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
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Friday, February 18th, 2011 AT 4:00 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Check fuel pressure and fuel pressure drop off when the key is shut. Directions are on our homepage under the DIY section.
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Monday, March 21st, 2011 AT 3:20 PM

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