Yes, I usually set it up a little richer, as noted. When warm and in steady state it won't matter where you set it, but cold or when accelerating the mixture is due to the base setting as the electronics are either asleep (till the O2 sensor warms) or too slow to keep up (as in sudden acceleration).

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician