GM ignition module spex (RR)

[rr]

I turned off a bunch of error codes through the diag
masks. Egr by setting enable temp at 150C. I had an
O2 sensor to help with tuning. The ecm would actually 
go closed loop and try to adjust the afr. The int & blm
would move!

For the aldl stuff see the links listed at the gmecm site.
The simple two-transistor interface works.

If you plan on TBI this is the way to go. You can get
a lot of stuff in place and run it as ignition only. This
will allow you to get used to the ecm, eprom burning,
tuning, etc. . . 

There is additional info in the gmecm arch*ves on incoming.

BobR.


On Wed, 20 Jun 2001 18:25:52 -0700
 "Darrell N." <darrelln at datalog.ab.ca> wrote:
> > 
> > I don't have the specs that you are asking about.
> However, can always
> > use a currently available ECM for ignition control:
> > 
> > http://www.diy-efi.org/gmecm/ecm_info/1227747/projects/747_ignition
> > 
> > BobR.
> 
> Ya know, this sounds like a plan.  I never thought of
> doing it this way 
> before, but after reading through the above link and a
> few others, it 
> seems like a good idea, especially since I was thinking
> of adding a TBI 
> unit later anyway...  Sure save me writing a sh*tload of
> assembler code 
> and developing all the necessary hardware.
> 
> I have a few questions, though:
> 
> 1. How do you fake out the ECM for the sensors that are
> not used, ie 
> TPS, O2, etc?  Does the ECM detect stuff like open
> injectors, etc?  
> How do you bypass the EGR stuff?  I would think that if
> you just left 
> them disconnected, you'd get error codes and maybe even
> cause the 
> ECM to go into limp dick mode...  You didn't mention this
> in your 
> explanations.
> 
> 2.  Where can I get a ALDL-RS232 link adapter (or
> schematics thereof) 
> to monitor the system?  How about software?  I assume you
> program 
> the eprom with any standard programmer?
> 
> 
> darrell n
> Calgary, Alberta, Canada
> ----------------------------------------------------------------------------
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