Loose internal components may cause catalytic converter failure on Ford Crown Victoria

Catalytic converter failure is common. Internal components become loose, causing a rattle or creating back pressure in the exhaust.

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Average mileage: 81,500 (75,000–88,000)
4 model years affected: 2003, 2004, 2005, 2008
5 people reported this problem
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problem details
2008 Ford Crown Victoria 75,000 mi,
Loud rattle in left 2nd catalytic converter.
2005 Ford Crown Victoria 88,000 mi,
rattle right exhaust, replaced $900.00
After I changed my coil on my vic my converter began to tap and have a hard time gaining speed.