Well last night my friend in his T/A was following me back to my house,We caught a stoplight and he was behind me I put it in nuetral and reved it a couple times just to toy with him, We get back to my house and he says that the first time a reved it two puffs of black smoke came out the exhaust but it cleared up right away and didnt do it the second time I reved it,He also said that you could smell oil, Im going to go pull a plug tonight and see what it looks like but what could all factor in to it running rich?

 

Black smoke is running rich.
Blue smoke is oil burning.

If you are just reving your motor at the light chances are it's running rich, pretty normal in your case. Pull a easy plug and look at it.