2005 Cadillac STS red exhaust pipes

Tiny
CARTER1965
  • MEMBER
  • 2005 CADILLAC STS
  • 4.6L
  • V8
  • RWD
  • AUTOMATIC
  • 109,235 MILES
Mycar has a miss and the exhaust pipes under the car turn red why?
Monday, June 29th, 2015 AT 7:52 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,737 POSTS
More than likely the misfire is spark-related. That will send unburned fuel into the exhaust system where it burns in the catalytic converter. That fuel is what makes it get red hot. It won't take very long for the catalyst to melt and become plugged.
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Monday, June 29th, 2015 AT 9:03 PM

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