Odd fire Buick/Jeep V6 question

[Ludis Langens]

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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