engine problems

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 12, 2011 at 5:28 PM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,989 POSTS
malfunctioning EGR maybe? check for codes.
May 12, 2011 at 5:50 PM
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FIXITMR
  • ✓Experienced Mechanic
  • 9,989 POSTS
maybe bad TPS? worn at that 55ish spot from highway use.
May 12, 2011 at 5:51 PM
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