Dual injector select on crossfire injection.

[Kevin Reynolds]

That sounds possible, because it seems to be a ground connection. So
grounding that port would signal twin injector use over single.

Thanks Ludis

>
.
> Some crossfires use the same ECM as some single injector 4-cyl engines.
> Presumably, the hardware needs to switched between these two setups.
> Because of limp home mode, this can't be a software selected option -
> the CPU might be too ill to select it.  So, that explains the dual
> injector select input.  (Some later ECMs have selectable cylinder
> counts.  The 1226870 and siblings can be wired for 4, 6, or 8 cylinders.)
>
> The 1227747 doesn't have anything like this.  It's only mode is dual
> injector TBI.  (Cylinder count isn't important for TBIs.)
>
> --
> Ludis Langens                               ludis (at) cruzers (dot) com
> Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/