Ive searched a little and i think i have all the symptoms.. Black smoke from tailpipes.. glowing cats.. smokey smell inside car.. it could be in running rich of clogged cats right? i have a pretty bad exhaust leak somewhere too.. if im running rich wat do i do?
Is the leak before the oxygen sensor? This can cause real issues because air is also being sucked into the crack, making the sensor read lean, causing the computer to dump fuel, destroying the cat.