The Fiero Store sells a scan tool/cd to monitor ECM values & parameters.
Has anyone come up with a DIY alternative?

Also, here is a related question I am curious about.
Apparently there is a difference between the 85 V6 ECM and the 86-88 ones. Why is the 85 ECM different?
Thanks, Kit

[This message has been edited by Kitskaboodle (edited 09-03-2022).]

See if this helps. I believe this is made by Phonedawgz on here.
https://reddevilriver.com/aldl.html

quote Originally posted by Kitskaboodle: Also, here is a related question I am curious about. Apparently there is a difference between the 85 V6 ECM and the 86-88 ones. Why is the 85 ECM different? Thanks, Kit

Because GM made changes to the ECM for exact same engine and ECM PN changed.

Some ECM versions can use same PROM/MEMCAL but others can't like 87-88 Fiero 4cyl vs old versions. This Engine is completely different and may look same to some but isn't and ECM is on different level then early years too w/ Cruise Box built into that.
Highlights, See my Cave, Duke Quick Ref

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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

Thank you Imsa.
I’m trying to contact PhoneDawgz now.
Thanks Ogre for the input on my question about 85 vs. 86-88 V6 ECM differences.
Kit