Eric Stage I said:Yes, the MAF is reading too low.
Since the MAF is not locked at 255, the timing won't be locked to a certain value.
I would replace the MAF, and reset the chip to the defaults so the target A/F is back to 10.8 for now.
Rustyregal said:I understand that 12.5 is lean compared to stoichiometric 14.7. My TT chip has. Max setting of 12.5. The reason I proposed the question was due to my chip burners request to set it back to an even leaner 10.8. But thanks for the input all the same.