1999 Chevy Lumina Catalyic converter plugged

1999 CHEVROLET LUMINA
200,000 MILES • 6 CYL • 2WD • AUTOMATIC
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WILLSON503
  • MEMBER
  • 2 POSTS
In the last year I have had to replace the catalyic converter twice. What would cause it to plug up?
Can I get a test pipe to run the car while it is being tested to find the cause?
Nov 15, 2009 at 10:32 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
As far as the test pipe, you need to find out what the local laws are in your area.

Now for the converter, has the check engine light been coming on? Also, with 200K on the engine, it could be allowing unburned fuel (due to compression) to enter the converter.

Let me know about the light.
Nov 15, 2009 at 11:15 PM
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WILLSON503
  • MEMBER
  • 2 POSTS
Yes the check engine light comes on.
The codes indicate the converter is plugged.
Nov 16, 2009 at 11:02 AM
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