87 ECM prom code
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
Racer
Joined: Apr 2003
Posts: 426
Likes: 0
From: Detroit MI
Searched:
GM P4 ECM Cross reference
16198259
Schematic
Application: 1986 2.0 L4 TBI “P” LQ5 w/ MT
1986-89 5.0 V8 TPI “F” LB9
1986-89 5.7 V8 TPI “8” L98
1987-91 truck 2.5 L4 TBI “E” LN8
1991 truck 2.5 L4 TBI “A” L38
MEMCAL IDs: “P”: CRY, CRZ, …
“F”: AUM, ACXT, AKFM, AKFR, …
“8”: BUA, AANK, AANL, APYP, APYU, AUJM, …
“E”: ADHF, AMJW, ASWY, AXAA, …
“A”: AUXH, …
EPROM type: 27C128
GM P4 ECM Cross reference
16198259
Schematic
Application: 1986 2.0 L4 TBI “P” LQ5 w/ MT
1986-89 5.0 V8 TPI “F” LB9
1986-89 5.7 V8 TPI “8” L98
1987-91 truck 2.5 L4 TBI “E” LN8
1991 truck 2.5 L4 TBI “A” L38
MEMCAL IDs: “P”: CRY, CRZ, …
“F”: AUM, ACXT, AKFM, AKFR, …
“8”: BUA, AANK, AANL, APYP, APYU, AUJM, …
“E”: ADHF, AMJW, ASWY, AXAA, …
“A”: AUXH, …
EPROM type: 27C128
Thread Starter
Intermediate
Joined: Jun 2011
Posts: 46
Likes: 0
From: Eau Claire WI
From what I found online it looks like abtk is the 87 auto code unless I am missing something I don't see that here. My car has rpo gm1 so it's the 2.59:1 rear and md8 for trans.
Le Mans Master
Joined: Aug 2010
Posts: 9,272
Likes: 17
http://forums.corvetteforum.com/c4-s...d-of-prom.html
check this thread , seems to have it, actually a midyear 86, released in 87, this thread is from 2006 BTW
check this thread , seems to have it, actually a midyear 86, released in 87, this thread is from 2006 BTW
Last edited by oldalaskaman; Jan 17, 2012 at 10:55 PM.
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Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Would work in yours but you would have to disconnect the cold start injector as '89+ TPI
added extra cold start fuel through the injectors;
not the standalone CSI used on earlier TPI cars
Not all proms are documented online.
You will note there are 15 different ones for the Vette w/man trans in 87 alone
http://www.chevythunder.com/prom_bcc_1987.htm
Every time GM made any adjustment to a tune they issued a new BCC
Last edited by rodj; Jan 18, 2012 at 01:30 AM.
Thread Starter
Intermediate
Joined: Jun 2011
Posts: 46
Likes: 0
From: Eau Claire WI
Thanks for the chart! So correct me if I am wrong... As long as I use a code in my car that matches trans and gear I should be fine if all gm did was change the code due to an update. In this case abtd would work.... Thanks again!
