I have found ECMs with the following PROMS:
ACLH9778
AMJW8486

Does anyone know what these are from? Thanks.

 

Yep.
ACLH 88 2.5 Auto 1227165ecm
AMJW 89 2.5 Auto 1227165

 

Here are a couple of more. I hope someone can decode these numbers for me.

#1. 16035006 8605 (stamped on the side)
6E Cal
160553 8603 (Inside top hole)

#2. 68767 8724 (stamped on the side)
6E Calibration
Delco BUA 1728 (On silver colored sticker inside top hole)

Thanks for the help.

Jake

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1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9

 

JakeJr, the "BUA" PROM, I believe, is from a 1986 'vette. I'm not sure about the ratios, tranny, etc. I was looking all over the Houston area for an ECM/Memcal/PROM that would work with my 1987 GTA 350 TPI setup, and found this guy with a 1227165 ECM and BUA PROM from a 1986 'vette. He had some other 165s, but did not know where they came from, so I got the 'vette unit. Stupid me - everything I had read said that the VATS was not introduced until 1988, but just today there was a post stating that it began in 1986 on the 'vette. To add insult to injury, the ECM was toast. I got a lifetime warranty ECM from O'reilly's only to find that the VATS is screwing things up now that the ECM is capable enough to use it. To answer your question, though, I did call a GM dealership to confirm that the PROM was for a 1986 Corvette.

 

Thanks for the info. Yes, my 86 Vette has VATS.

I'm sure someone with a burner can turn off the VATS in the PROM for you. Everything should work okay then.

I bought a rebuilt ECM from O'Reilly's too, about a year ago.

The two PROMS I posted have 89 bin files and 6E calibration (whatever that means).

They've been modified with EGR turned off, idle speed raised and a slight change to the TCC.

I suspect they are both Vette PROMS too.

Thanks again,

Jake

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1986 Corvette Coupe, 415 CID, Edelbrock 6073s, ZZ9