engine problems

2003 FORD CROWN VICTORIA
156,000 MILES • V8 • 2WD • AUTOMATIC
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CARCAT
  • MEMBER
  • 1 POST
WHAT CAUSES A CAR TO JUMP AROUND 55MPH SORT OF HESITATE...i have replaced the fuel filter,plugs,air filter
May 13, 2011 at 12:28 AM
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FIXITMR
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 9,990 POSTS
malfunctioning EGR maybe? check for codes.
May 13, 2011 at 12:50 AM
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FIXITMR
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 9,990 POSTS
maybe bad TPS? worn at that 55ish spot from highway use.
May 13, 2011 at 12:51 AM