O2 sensors wear out over time and cause the engine to run rich generally, which can lead to a clogged cat over time. We had a podcast on this a few weeks ago. But basically you should replace the...
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Type: Posts; User: 4.3LXJ; Keyword(s):
Re: **Engine help**
O2 sensors wear out over time and cause the engine to run rich generally, which can lead to a clogged cat over time. We had a podcast on this a few weeks ago. But basically you should replace the...
Re: **Engine help**
If you have never changed the O2 sensor, I would recommend starting there. Also, the cat might be plugged too. O2 sensors should be changed every 50K as part of a tune up