HIGH SPEED MIS ENGINE LIGHT FLASHING CHANGED S ...

  • 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
  • 18,993 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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