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black smoke
ive been having black smoke coming out of my muffler for some time now i was just wandering what it could be from. i thought it might be a bad o2 sensor making my car run too rich or something but i installed a new one and its doing the same thing. when i took the old one out there was black carbon shit all over it. anybody now whats wrong? and if i installed a new 02 sensor do i have to like reset the ecu or something?
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