Just bought a 03 with the 6 speed, completely stock I believe. The guy said the previous owner "may have put bigger injectors in it" but he's not sure. Anyways I know this thing will roll coal when hammering on it but it's also blowing a little black smoke after every shift and just taking off. Is this normal or a possible problem???? Hoping for good news....

 

Normal. Put a tuner on it to utilize those injectors And yes you have bigger injectors!