The stock computer died on me a few years back and it was replaced by a mechanic. The new computer doesn't list any kind of EPROM code. Can anyone help me out?

Originally it was an 89 305 TPI. Thanks!

I guess I'm confused by TRAXION's FAQ. Which of those is my "EPROM code"? -- $6E, 27C128, or 1227165?? Thanks again.

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Maverick
1989 Formula 350 TPI
5spd Tremec 3550/TKO
several suspension mods

6E is the program mask number, ie how the tables are laid out
27C128 is the eprom type
1227165 is the ecm number

It's the Broadcast code number your lacking. If you can scan the ID number using a scan tool, there maybe help.

And what if I don't have a scanner?

Did GM use several different EPROMs?

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Maverick
1989 Formula 350 TPI
5spd Tremec 3550/TKO
several suspension mods

Then you'd need to find a friend with one or stop at the dealer if it's that important to you.

Yes GM has used many different eproms 2716s, 2732s, 27128s, 27512s.

Have you looked inside the memcal itself and looked? Under the blue cover might be an AL foil piece with a 4 digit alpha code on it.

I finally got around to digging the computer out of the dash again (been busy with work). I found 2 #s on the actual EPROM. The first, appears to be a serial number or part number -- 16133420 8839. The second (I think) is the EPROM code: Delco ANYX 9375. That's all I found on the chip itself. Is this right?

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Maverick
1989 Formula 350 TPI
5spd Tremec 3550/TKO
several suspension mods

ANYX is the Broadcast Code for a 89 5.0 Man

So 9375 is the EPROM code? (Sorry for all the dumb questions, and thanks for your help, btw).

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Maverick
1989 Formula 350 TPI
5spd Tremec 3550/TKO
several suspension mods

I'm confused about your term eprom code.

The prom *Mask ID* describes which code is on the prom.

The *Broadcast code* tells what the eprom is calibrated for (application wise)

ECM, part no., that's just the part no. for the computer itself.