2002 Ford F150 vehicle rough idle/sputter under load

2002 FORD F-150
121,000 MILES • V8 • 4WD • AUTOMATIC
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INFRAREDDS
  • MEMBER
  • 1 POST
Vehicle sputters under load at constant rpms (more pronounced between 1300 to 2700 rpms) ..Is not as noticable during acceleration. Over 3000rpms engine runs much smoother.. Trouble codes came up as PO-303, PO-304 and PO-316.
Nov 20, 2009 at 10:47 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
They are all misfire codes. When was the last tune up? You may have a weak plug, a wire that is shorting...

Let me know.
Nov 22, 2009 at 12:56 PM
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