[Gmecm] Torque converter clutch on 1226869

[William Lucke]

I had heard that the '85 Fiero ECM had knock sensing capabilities built 
in... I hadn't heard that it had boost awareness and wastegate control 
as well! Dam. I may have to look into that further for a project or two.

What ECM was used in the 86-88 Fieros?
What code mask does the 6869 have?



Will


> From: "David Allen" <davida1 at hiwaay.net>
> Subject: [Gmecm] Torque converter clutch on 1226869
> 
>   I'm playing with my 6869-controlled turbo car, and trying to get the ECM
> to control the torque converter clutch.  It seems there are no numbers I can
> put in the calibration which will actuate the TCC output.
>   I have a test light on the TCC ouptut at the ECM to emiminate any other
> external factors.  Some things I have verified:
> 
> Scan data shows the trans in "Drive"
> Scan data shows coolant is hot.
> Scan data indicates vehicle speed; and is reasonably correct.
> Scan data indicates TPS is working; and is reasonably accurate.
> No DTC's present.
> "Automatic Transmission" is selected in the ECM calibration.
> Test light does work when manually grouned.
> 
> I have tried putting very "loose" boundaries in the ECM to make it lock up
> most of the time but can't get it to illuminate the light.  No combination
> of road speed and throttle position will make it actuate. The schematic does
> not indicate any high gear switch on this ECM. What can I be overlooking?
> Thanks in advance,
> David


> From: "David Allen" <davida1 at hiwaay.net>
> Subject: Re: [Gmecm] Torque converter clutch on 1226869
> 
>   Zaphod, the .bin started out as FTX 9349 which is an 85 Fiero 2.8
> automatic. I have selected "2-bar MAP" in the ECM switch table and left
> "transmission type" unchecked since "X = manual" Then the spark and fuel
> tables have also been tuned somewhat.
>   Another thing I can't make work no matter what I place in the .bin is the
> wastegate bypass control.  I am wondering if I need to start out with a
> different .bin but there aren't many out there for this ECM.
>   Thanks,
> David