1994 Buick Century milage droppped to less than 20 from ove

1994 BUICK CENTURY
52,000 MILES • 4 CYL • 2WD • AUTOMATIC
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DRXTAL
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  • 1 POST
Dar Car Pros- my catalytic converter is making the rattling noise and my milage dropped considerably from over 30 to less than 20. Is it plugged?
Oct 3, 2009 at 12:36 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
If it is loose inside, chances are it is plugging the exhaust, and yes it will cause a big change in fuel mileage.
Oct 7, 2009 at 1:29 PM
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