My 95 cobra is running rich as heck. When it is running the gas fumes will choke you. I got on it the other day and happened to look in my mirror and saw the dark smoke. Where do I need to start to correct this?
even if not, you should pull for codes and see if any are present. my best bet is your O2's are done.
cleaning your MAF and doing a tune up wouldn't hurt at all.