Originally Posted by 68Cadillac
I've seen that. You may need to redo your MAF table and/or Injector size in the ROM. Once I get my MAF and Injector dialed in the AFR measured by the wide-band is usually +/- 0.2 from Target AFR.
My car actually did the same thing. I am using a stock meter in a stock box, with stock injectors... And I always see a richer mixture than the Target AFR.