2006 Cadillac CTS misfire # 5 cylinder

2006 CADILLAC CTS
115,000 MILES
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BILLY C
  • MEMBER
  • 21 POSTS
Changed spark plugs switched # 5 and # 6 ignition coils still misfire cylinder # 5.Ran injector kill test.NOTICED slight change in RPM. Bad injector ??? Checked other 5 cylinders with injector kill test noticed substancial RPM and engine change,I am using a snapon Solis Ultra to check vehicle and run tests.
Nov 20, 2013 at 6:44 AM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
Have you checked spark and compression on the number 5 cylinder yet?
Nov 20, 2013 at 7:13 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check compression first then do a freeze frame and check values as it could be a maf sensor or any other thing , these are really hard to diagnose Also check fuel pressure and check resistance of injectior. If compression ok and injector ok pull valve cover to see if lifter/follower damage. injector should be11-14 ohm
Nov 20, 2013 at 7:16 AM
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