Main ve table or backup?
If you apply any of our SD VCM Enhancements, this issue is fixed for vehicles with a secondary VE table.
Also, in factory GM SD, it will also use the low octane spark table. In our SD VCM Enhancements, in SD it will use both the high octane and low octane as normal.
You should apply the changes to both tables while you are tuning. By doing this, should you decide to return to MAF operation, your primary VE will be dialed in.


