erratic running 85 325e...o2 sensor???

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jsb
E30 Zone Newbie
E30 Zone Newbie
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Joined: Tue Apr 12, 2005 11:00 pm

Post Wed Apr 13, 2005 9:18 pm

my 85 325e runs fine for a while then stalls out but will continue to run with my foot holding the pedal down but in this case very rough with copious black smoke coming out of the tail pipe. then, for no reason will go back to running normally. could this be the o2 sensor????? thanx!!!