MSefi.com read only forum (Jan.15,2018)

They should be white mostly, use a flashlight to look at the base of the porciline, there should be a thin gray colored ring, the thicker and darker it is the richer you are. spark plugs with a hotter heat range will stay white farther from the tip to the base but the ring at the base is what I use ...

its in Fuel set-up. Ego Control

make sure the EGO correction is disabled until you have your VE table tuned
also check the TPSdot setting is high enough so your not getting false accel enrichment