Check the condition of your spark plugs and plug wires.
I checked the plugs and wires, and everything looks good.
I completed a Calc VET but the results made the car run very rough. I then tried applying only the MAF table and the car idled in the 12s AFR.
Not sure what's going on here. I have attached my Calc VET log, and the values applied to a tune.
I ran the car yesterday with B0120 set to 400 with the pre VET tune (iLS6 944 Derron.ctz), and the car ran quite well. Ran a short log and attached the file (LS1B_Calc VET July 28th.efi)
Calc VET log = (LS1B_0143 orig.efi)
Calc VET applied to original tune (July 20th (MAF+VE Applied) B0120 4000.ctz)
Short Calc VET log collected yesterday with the original tune (LS1B_Calc VET July 28th.efi)
Whats odd is the car ran very well with the tune that I originally posted.
When you do a Calc VET, you need to be in open loop (disable your fuel trims). You also need to be in MAF only mode... your log LS1B_0143 looks like you were in blended mode.
( BTW: in your tune, B3618 PE table is set to EQR 0.86 which is incorrect... set it to EQR 1.175 (i.e. 1/0.85) )
If it idles that rich that something is going wrong...