Acceleration Enrichment System B28F and B21FT (L)

This system is installed on B28F MY 1982 and B21FT (L) 1984-85.


It is only engaged at coolant temperatures below 53 degrees C (+127 degrees F).

NOTE: Also applicable on B28F 1980 81 equipped with a service kit. (Refer to Service Bulletin Group 25 No. 101.)

This system should be checked with a cold engine but can also be checked with the engine at normal operating temperatures.





Procedure

Connect a vacuum pump to the pressure differential switch and evacuate switch.


Release vacuum. When vacuum is released the switch closes. The dwell meter reading should change to 70 degrees or above for a short period and then decrease.





Connect a jumper wire between the pins in the the connector, as illustrated.

If meter now reads 70 degrees or above, wiring and control unit is OK.

^ Check vacuum hoses (replace if applicable).

^ Check thermo valve.

^ Check differential switch.