My girlfriends 99 Mercury Cougar spits out black smoke when she drives it. I know this means she is running to rich but how do I fix it. Sorry about posting this up in a honda site but you guys are the only ones who know what you are doing.

 

Find out how to reset the ECU. That'll probably help. Otherwise, it might be a timing problem, I think.

 

I think you should replace the muffler... j/k
Try reseting the ecu