will a wore out cat. converter make a roaring noise on deceleration

2002 CHEVROLET SILVERADO
208,000 MILES
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ETHAN9
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  • 1 POST
Cat. converter rattles when reved up in neutral and let accelerator off. truck making noise when decelerating between 35-15. u-joints and carrier bearing just replaced. wheel bearings and breaks appear to be fine
Oct 14, 2011 at 2:33 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
The insides sound like they came apart in the cat. I would suggest replacing it before it causes other problems. As far as the noise, it could make noise, but I don't know about a roaring noise. Do you only hear it when you decelerate?
Oct 14, 2011 at 2:38 AM
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