High speed mis, engine light flashing, changed.

Tiny
ANONYMOUS
  • 2008 GMC SIERRA
  • 60,000 MILES

High speed mis, engine light flashing, changed s plugs. What next?
also smells like cat converter overheating when I shut off, no red glow, but a high speed mis, usually on the highway

Sunday, November 18th, 2012 AT 9:37 PM

1 Reply

Tiny
DOCFIXIT
  • EXPERT
  • 18,987 POSTS

Have codes read may provide a clue post codes will advise

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Sunday, November 18th, 2012 AT 9:45 PM

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