2001 Ford F-150 missing and hesitation

2001 FORD F-150
158,000 MILES • V8 • 2WD • AUTOMATIC
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LUVMYFORDALWAYS
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  • 1 POST
my truck idles rough, and when applying gas pedal, it stutters and bucks, until i let off or get up to about 65 to 70 mph. Have pulled and cleaned all vacuum lines, no leaks found, cleaned MAF, and just replaced DPFE sensor. Still the same. Have codes 0301, 0304, 0171, 0401. Any help would greatly appreciated. Driving me nuts.
Oct 7, 2010 at 3:20 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.
Oct 7, 2010 at 5:14 PM
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LUVMYFORDALWAYS
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  • 1 POST
I replaced cop and plug on cylinder one and all is good as new now. Thanks
Oct 14, 2010 at 2:20 PM
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