1992 Jaguar XJ40 missing xj40

1992 JAGUAR XJ40
150,000 MILES • 6 CYL • 2WD • AUTOMATIC
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SHAWNCANADA
  • MEMBER
  • 5 POSTS
The car misses after it reaches operating temperature at all rpms more noticeable at an idle
May 23, 2009 at 6:24 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.
May 23, 2009 at 6:36 AM
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