1997 Buick Regal Engine Miss

1997 BUICK REGAL
158,000 MILES • 6 CYL • 2WD • AUTOMATIC
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KAWAIIWOLF
  • MEMBER
  • 1 POST
The check engine light is on. The engine has a miss at idle and the diagnostic tool says its cylinder #3. I have replaced the coil, spark plug, and spark plug wire, but there is still a miss. What else could I try?
Dec 22, 2009 at 5:21 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
Check no.3 compression and injector

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.
Dec 22, 2009 at 5:24 AM
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