Have you evaluated the eHA current? Does it have appropriate cold enrichment current. It should get 50-70ma cranking and then around 20 after starting quickly dropping to just a few ma within 30 sec.

Does it idle good warm in closed loop? Restricted injectors would effect cold running idle but would also make it rough in closed loop.

With all that right you need to evaluate differential pressure to get a handle on the distributor fuel control. Also be very sure the airflow plate is centered both radially and veritically.

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