2002 Lincoln LS engine miss

2002 LINCOLN LS
88,000 MILES • V8 • 2WD • AUTOMATIC
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JOHN DWYER
  • MEMBER
  • 1 POST
engine has intermittent miss when warmed up.a code stated #4 cyliinder misfire. replaced all 8 spark plugs and # 4coil,and erased codes. problem is still there. there are no codes in computer.
Jul 13, 2009 at 5:34 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the no.4 compression and injector

Engine Misfire 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.
Jul 13, 2009 at 5:37 AM
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