MSD ignitions DIS 4 Digital

[Juglenaut]

I am in need of some pre-install help with my ignition. Seeing that some of you have put this ignition in , can you guys give me a few pointers.

If I don't have to test for the positive lead on the Base ICM that would save me some time. The base ICM should be similar from 91-93 as for polarity and such.

If I can get polarity information I can prewire the harnesses.

According to the Factory wire diagrams the very first (#1 cylinder) lead is positive and every coil connection the positive is the first lead.

Anyother information I might like to know would definitly help

[SappySE107]

I know its not the first lead one one, but I dunno which it is, im thinking the middle one.

I wouldn't install it, but thats just me.

[pocket-rocket]

As I remember, Ben said the only gain he had on his 91 GP from the MSD was gas mileage and if he ran something that was triggered by engine speed (like nitrous or two stage intake).