cats question
Thread Starter
Race Director
Joined: Aug 2002
Posts: 10,218
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From: not far enough from Chicago
cats question
On a stock 98 exhaust as they age and more miles are on them, do they start to deteriorate in a way that they will become more or less or maintain their original restriction?
Thanks guys
Thanks guys
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
IF,,,,,,,,,,,,,,,,,,,,, they don't over heat and the engine is not running really poorly, they usually just become less effective and then stop being a catalytic converter and more like a filter. Over time they can clog.
IF the engine runs excessively RICH, has a misfiring cylinder/s for a long period of time they can overheat and melt. Sometimes they clog and others they melt, break in to small pieces and the matrix ends up in the muffler
IF the engine runs excessively RICH, has a misfiring cylinder/s for a long period of time they can overheat and melt. Sometimes they clog and others they melt, break in to small pieces and the matrix ends up in the muffler
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Over time, they do tend to degrade in performance and eventually may require replacement.
Instructor
Joined: Oct 2001
Posts: 191
Likes: 1
From: Westport CT
Having this exact problem now on my '99. Cats clogged. Headers, cold air intake, mild tune. Random Tech hi flo cats with ~ 40,000 miles clogged, destroyed. car would not rev past ~4000 rpm. sounded tired.
What causes this?
What causes this?
Racer
Joined: Mar 2016
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From: PA
