[Gmecm] GM 1227730 ECM and Wideband o2 Question

[Steve Ravet]

> -----Original Message-----
> From: gmecm-bounces at diy-efi.org 
> [mailto:gmecm-bounces at diy-efi.org] On Behalf Of Justin justin
> Sent: Monday, February 06, 2006 10:19 PM
> To: gmecm at diy-efi.org
> Subject: [Gmecm] GM 1227730 ECM and Wideband o2 Question
> 
>   I have heard from several people that you can adapt a wide 
> band o2 sensor to the 730 ecm.  I guess they use an o2 that 
> has a narrow band and wideband port and they plug the wide 
> band part into an analog port in the ecm and modify the code 
> somehow to read the wideband for tuning.  The ECM doesnt use 
> the o2 input or anything but the analog port sends data so 
> you can see where you are at in all throttle ranges.  Have 
> any of you guys heard of this?  If so which o2 sensors do you 
> recommend for this application?  Thanks - Justin

Justin, I'd recommend some reading at thirdgen.org, in the DIYPROM
section.  I think both O2 sensors are run, with the WB is connected to
an unused analog input and the PROM modified to put this value into the
ALDL stream in the place of some other value.  A normal scan tool won't
make sense of this value but the freebies can be configured to display
it.

--steve


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