I am curious if the sound of popcorn popping when I am driving is the signal that my catalytic converter needs to be replace???
Sep 3, 2008 at 9:09 AM
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RASMATAZ
✓Experienced Mechanic
75,988 POSTS
If its not detonation, could be vacuum and exhaust leak-You can have the exhaust system backpressure or gas tested to rule out a failing catalytic converter.