DFI, Batch Fire, and other myths

[Roger Heflin]

On Wed, 20 Jan 1999, Andrew K. Mattei wrote:

> ECMnut at aol.com wrote:
> > 
> > With the GM stuff, I believe most of the 8 cylinder applications
> > have injector circiuts A & B, and they alternate..  
> 
> I popped open my 165 ECM the other day ('89 TPI 350) to check this out,
> and though it has a left bank / right bank wiring, the traces are
> soldered together on the ECM board. So, in the case of the Chevy TPI
> 8-cylinder motor, they all fire together. :) (IIRC, only has one
> injector driver inside the ECM too.)
> 

Looking in the 93 Z28 programming there appear to be two different
drivers.  They are using two different timer registers to time the
injector open time, which would lead me to believe that they are
handled differently.    

				Roger