2002 Cadillac STS Misfire

2002 CADILLAC STS
160,000 MILES • V8 • FWD • AUTOMATIC
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SHADYPENZ
  • MEMBER
  • 1 POST
P0306 Misfire Code
Have tried....Coil,Plugs,Injector,Intake Gasket,Ignition Control Module....All Cylinders have 175 lbs Compression...Any ideas???
Mar 28, 2010 at 9:10 AM
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FACTORYJACK
  • ✓ASE Certified Mechanic
  • 4,159 POSTS
  • ASE Certified Mechanic
Sounds like youve tried most possibilities. You could have a broken valve spring, or a follower that came off. You will still have compression, It will possibly build faster. The only other possibility would be to check that the #6 injector is firing, you would need an injector test(or noid) light for that. What condition is the spark plug when you remove it from #6 cylinder, is it wet?
Mar 28, 2010 at 10:36 PM
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