Quote:
Originally Posted by ZionsWrath
It's not good to do but the potential shortening of lifespan to the cat may not be noticeable.
I drove from NJMP to NYC on a misfire p0301. About 250 miles. A few months later I got a p0420. I cleared it and it after 2 more years i sold the car didn't get a p0420 again.
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Thanks for all the responses. I am more concerned about hurting performance than damaging a replaceable cat. I am slow enough as it is and don't want a clogged cat holding me back.