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Discussion Starter · #1 ·
When should you replace the catylitic convertor? I have had problems in the past passing emmissions. The truck has been running rich for a long time.

I have fixed the rich condition, should I replace the convertor?

Chuck B.
 

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Do the emission test,or have a convertor effeciency test done.That will tell you exactly how well it's working.

Heat is also a sign the catalyst is still functional.After a good hard drive,the cat should be quite hot,much hotter than the rest of the exhaust system.
 

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Can back pressure be checked to see if the converter is plugged?
 

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Yes,you can check backpressure too,but i would only bother if the truck exhibits a driveability concern that would indicate a plugged cat.

Backpressure does not show convertor effeciency though.
 
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