1975-76 530i & 3.0Si Models
With vacuum applied to vacuum retard unit (on distributor), check that ignition timing is retarded 13-15 degrees. On California models, test vacuum solenoid valve and coolant temperature switch.
With vacuum applied to vacuum retard unit (on distributor), check that ignition timing is retarded 13-15 degrees. On California models, test vacuum solenoid valve and coolant temperature switch.