Memcals

[Swayze]

I got a chance to look at the diagram(s) today. I am no expert but it looks like the CAL?? voltages tell the chip to out put to the TPU?? outputs/inputs on the other chip and from there to the BUF2,3,5 for the injectors. so it would use the EST to fire the injectors based on the voltages dropped from the netres circuit on the board. If I am way off base here please let me know. If I am close-- what resistor network would control pulse width-- the one on the EST(BUF3?) or or one of the others.
byE
Mike S. (EE challenged(ignorant?))

Swayze
mswayze at truswood.com
kswayze at bellsouth.net

----- Original Message ----- 
From: "Ludis Langens" <ludis at cruzers.com>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Wednesday, January 19, 2000 8:55 AM
Subject: Re: Memcals


> Swayze wrote:
> > 
> > has anybody documented the netres
> > circuit in a memcal? (is it a black goo
> > device--I haven't snagged an ecm
> > yet).I'm a newbie  and learned not to
> > make any mods to a  circuit without a
> > schematic(long ago).
> 
> I've traced out the schematic of the 1227748 ECM.  This ECM is somewhat
> unique in not using a MEMCAL.  Instead, it has a bunch of resistors
> soldered to the PCB.  With a MEMCAL, the resistor networks move into the
> MEMCAL.  Do I hear a volunteer that'll figure out the correlation
> between the two types?
> 
> -- 
> Ludis Langens                               ludis (at) cruzers (dot) com
> Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
> 
> 

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