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2006 Cadillac CTS misfire # 5 cylinder

Tiny
BILLY C
  • MEMBER
  • 2006 CADILLAC CTS
  • 115,000 MILES
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.
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Wednesday, November 20th, 2013 AT 2:44 PM

2 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Have you checked spark and compression on the number 5 cylinder yet?
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Wednesday, November 20th, 2013 AT 3:13 PM
Tiny
HMAC300
  • 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
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Wednesday, November 20th, 2013 AT 3:16 PM

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