1995 trans am a4 borla catback, k@n cold air, 3.73 gears, transgo shift kit. car is running rich and at wot it is lean anyone know why

 

How rich and how lean? Any PCM programming?

 

i have a tune tho lt1pcmtuning solomon it was running rich before that has been for a awhile now i only know that cuzz of the black soot on rear bumper no codes and i was using data master free trail its up now i can't remember the numbers but i sent it to solomon and he said it was running lean pretty bad at wot fine other than that just at wot.

 

on the data master file at wot the spark retard goes as high as 11.8 and knock count is 3014 if this info helps.

 

anyone?