When
you switch the primary injectors off and secondary
injectors
on - the EC2 is still providing the same pulse duration (assuming
engine
manifold pressure, etc are the same) for the almost twice as large
secondary
injectors as it did for the smaller primary injectors. Ergo, you
are
feeding the engine almost twice the fuel (for the same engine
conditions)
as you did when on the primary injectors. The engine is choking
on
too much fuel.
Unless, of course, you
have made the mode 6 adjustment to compensate for the difference in the flow
rates – or will mode 6 not handle such a big differential.
Al G