1998 Ford Expedition Engine bogs down while at idle

1998 FORD EXPEDITION
147,399 MILES • V8 • 4WD • AUTOMATIC
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STSUPERNAUT
  • MEMBER
  • 2 POSTS
I did as you had said, "about going to autozone" to have the systems codes check. It came back with 4 codes, ie. P0171, P0174, P1131 and P1151. What is the next step to fix this problem? I just would like ya to point me in the direction I should go from here.
Jun 28, 2010 at 7:22 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Lean fuel condition could be caused by one of the following below:

1.Vacuum leaks
2.EGR and PCV valve.
3.Low fuel pressure.
4.Dirty fuel injectors.
5.Mass Air Flow Sensor.
6.Oxygen Sensor.
Jun 28, 2010 at 8:15 PM
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KEVINJRGASTON
  • MEMBER
  • 17 POSTS
Lucas Complete fuel system treatment (found at most autoparts stores) could take care of a couple of those issues related to clogs in the fuel system. It could be the o2 or egr, though
Jul 5, 2010 at 4:23 PM
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