Odd fire Buick/Jeep V6 question

[Mike Dillon]

>

Thanks Ludis,

    Thats what I pretty much thought, this was a question posted to one
of the jeep list I am on. It might not be to bad to build a black box between
the Distrubutor and the ECU to condition the pulses between the two but
it would likely be more trouble than it is worth.

Mike D.

> From: Ludis Langens <ludis at cruzers.com>
>
> Mike Dillon wrote:
> >
> >     I have an interesting question, would there be a problem using a 747 ECU in a
> > old 225 cid odd fire V6 ?  I don't know the details how it does its timing
> > calculations
> > and would the non-uniform (in time) pulse timing confuse it ?
>
> I'm quite sure that the non-uniform timing will cause problems.  Some
> timing stuff in the ECM is controlled by the "current" distributor
> reference pulse, some by the previous.
>
> The ECM also calculates a lot of values based on the time between two
> reference pulses.  If these vary, all rpm related and timing advance
> calculations will be wrong.
>
> - --
> Ludis Langens                               ludis (at) cruzers (dot) com
> Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/


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