1998 Ford Mustang miss

1998 FORD MUSTANG
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EU
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Engine Performance problem
1998 Ford Mustang V8 Two Wheel Drive 90000 miles

after engine warms up we have a miss , felt more
at higher rpm. we already replaced. wires, plugs,
coils,fuel filter, air filter, no codes?
Feb 13, 2009 at 9:43 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
Feb 13, 2009 at 5:21 PM
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