In the event of a primary or secondary injector failure, the affected injector set can be switched off and the cold start switch used to richen up the remaining injectors. This as per Tracy's instructions. I haven't tried this, and hope I never have to in the heat of battle, but there it is.

Brian Trubee

Brian;

If wired according to the manual; when one set of injectors is turned off, the pulse width to the other is AUTOMATICALLY doubled.  It does not require switching the cold start switch.

Al G