Backfire blew up muffler

Tiny
DAVE MATHIESON
  • MEMBER
  • 1989 CHEVROLET VAN
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
Back fired and blew up muffler. What is going on?
Wednesday, February 19th, 2020 AT 12:06 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

Sounds like you lost spark in the motor and the cylinders got a lot of extra fuel. Then the spark came back and ignited the fuel in the exhaust system and that was the result.

It could be either the ignition switch or the ignition module.

Roy
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Wednesday, February 19th, 2020 AT 1:33 PM

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