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Maybe if it was her Jeep?

So now it begins eh?

Crack in the header equals possible air in the exhaust in front of the O2 sensor which leads to a rich mixture. I had a mis once and made my muffler hot enough to discolor the muffler.

Jr, If your cat was smoking, I wonder if you have partially plugged up the muffler. I have the light, but not anywhere near you.