ECM/MemCal Part Numbers and Cross Reference
[ECM Part Numbers]
- [MemCal Part Numbers] – [Resistor Pack Cross
Reference]
Before we start thinking about programming our
own PROMs for tuning our rides, we need to know what we have (or want) to work
with. Below is a list of ECM and MemCal part numbers GM used in certain
years and power teams. If you want to know about your Firebird or other
year Camaros this topic doesn’t cover, check out
Thirdgen.org and visit their FAQ’s.
We have references to V6 and 4 cylinder Camaros
for reference. You will notice that, in some years, GM used the same ECM
for the V6 as well as the V8, but in others, they didn’t. If you are in
the market for an ECM, this information may help you get a better deal.
Two key things to remember. Some ECMs can
be used for either V6 or V8 applications, however, you must have a MemCal for
your specific engine and emissions options. Some MemCals are
interchangeable between different V8s, as long as they use the same ECM and the
resistor packs are of the same part numbers (see below).
This is a MemCal (Memory Calibration Unit) with the
cover removed. (Check out “Installing
the Moates memory adapter for 1986-1990 IROC-Zs” in the Articles section for
details on where it resides and how to access and remove it.) To the left,
is the PROM chip. This particular ECM uses a 128 byte (16K) PROM chip. The
center, smaller chip is one of two resistor packs (14-pin). To the right
is the second of two resistor packs (16-pin). These two smaller chips are
laser etched resistor packs that control start-up and limp mode controls.
Limp mode controls are essentially a backup code that the ECM can reference in
case something goes wrong with the PROM or other functions of the ECM that
prevents the vehicle from obtaining and computing usable data. If you are
obtaining a spare MemCal to work with or find a great deal somewhere for one,
you should ensure that it’s from a V8 car, from the same ECM and have the same
resistor pack part numbers (located on each chip).
http://clubs.hemmings.com/clubsites/fieroswest/Tech%20Scene/Sensors/MemCal/MemCal.htm
basically going over some markings and part number changes over the years based
on the Fiero. Similar applies to ours. Most of it refers to pre and
post 1994, but it also gives you more information in locating your part numbers
for your MemCal.
Please keep in mind that some data below may
not be complete.
|
Year(s) |
Cylinders |
Engine – Ltr (C.I.-Eng Code) |
ECM Part No. |
| 1992-90 | 6 | 3.1 Ltr. (189-T) |
1227730 |
| 1992-90 | 8 | 5.0 Ltr. (305-F) |
1227730 |
| 1992-90 | 8 | 5.7 Ltr. (350-8) |
1227730 |
| 1989-87 | 6 | 2.8 Ltr. (173-S) |
1227302 |
| 1989-87 | 8 | 5.0 Ltr. (305-F) |
1227165 |
| 1989-87 | 8 | 5.7 Ltr. (350-8) |
1227165 |
| 1987 | 8 | 5.0 Ltr. (305-H) |
1228079 |
| 1986 | 4 | 2.5 Ltr. (151-2) |
1226864 |
| 1986 | 6 | 2.8 Ltr. (173-S) |
1227302 |
| 1986 | 8 | 5.0 Ltr. (305-F) |
1227165 |
| 1986 | 8 | 5.0 Ltr. (305-G, H) |
1227169 |
| 1985 | 4 | 2.5 Ltr. (151-2) |
1226864 |
| 1985 | 6 | 2.8 Ltr. (173-S) |
1226870 |
| 1985 | 8 | 5.0 Ltr. (305-F) |
1226870 |
| 1985 | 8 | 5.0 Ltr. (305-G, H) |
1226865 |
MemCal Part Numbers/PROM Codes
|
Year |
Engine | Options and Emissions Designation |
Part Number |
Prom Code(s) |
| 1985 | 5.0-F | A/Trans(MD8) Fed, Calif, A/C | 1227739 | 2315HLK 2623CSU 3978HLK
9545FTM |
| 1985 | 5.0-F | A/Trans(MD8) Fed, Calif, Exc.A/C |
1227740 | 2352HLM 2488CSC 3800HLL
9656FTP |
| 1986 | 5.0-F | A/C, VD1,VE1 (Export) | 16061103 | 1107BLL |
| 1986 | 5.0-F | A/C, VB4, BT7 (Export) | 16061117 | 1120BLN |
| 1986 | 5.0-F | Fed, Calif, A/C, 215/65/15 tires | 1228290 | 3234ANY 8958AMU 8969ANB
8980ANY 8993AUM |
| 1986 | 5.0-F | Fed, Calif, A/C, 235/60/15&16 tires | 1228291 | 3236AUM 8958AMU 8969ANB
8980ANY 8993AUM |
| 1986 | 5.0-F | Fed, Calif, Exc A/C, 215/65/15 tires | 1228292 | 3240BTZ 8964ANA 8975AND
8987BTZ 8998AWC |
| 1986 | 5.0-F | Fed, Calif, Exc A/C, 235/60/15&16 tires | 1228293 | 3243AWC 8975AND 8987BTZ
8998AWC |
| 1986 | 5.0-F | VD1, VE1 Exc A/C (Export) | 16059564 | 9567BUR |
| 1986 | 5.0-F | VB4, VT7 Exc A/C (Export) | 16059576 | 9580BUT |
| 1986 | 5.0-F | Fed, Calif, A/C, 3.42(GU6) | 16059000 | 9004AWD |
| 1986 | 5.0-F | Fed, Calif, Exc A/C, 3.42(GU6) | 16059006 | 9009AWF |
| 1987 | 5.0-F | A/Trans(MD8) NM8 (Export) | 16066043 | 6046ABBK |
| 1987 | 5.0-F | A/Trans(MD8) Fed, 2.73(GU2) | 16068515 | 8517ABUN |
| 1987 | 5.0-F | A/Trans(MD8) Calif, 2.73(GU2) | 16088558 | 8562ABUT |
| 1987 | 5.0-F | A/Trans(MD8) Fed, 3.23(GU5), 3.27(GW6) Exc Export(NM8) |
16071097 | 1099ACXT |
| 1987 | 5.0-F | A/Trans(MD8) Calif, 3.23(GU5) | 16071106 | 1108ACXW |
| 1987 | 5.0-F | M/Trans(M39) Fed, 3.08(GU4) 215/65/15 tires |
16068578 | 4469AANR 8582ABUY |
| 1987 | 5.0-F | M/Trans(M39) Fed, 3.08(GU4) 16″tires | 16071115 | 1117ACXY |
| 1987 | 5.0-F | M/Trans(M39) Fed, 3.45(GM3) | 16071119 | 1122ACXZ |
| 1987 | 5.0-F | M/Trans(M39) Calif, 3.08(GU4) 215/65/15 tires |
16071128 | 1130ACYB |
| 1987 | 5.0-F | M/Trans(M39) Calif, 3.08(GU4)16″tires | 16071133 | 1135ACYC |
| 1987 | 5.0-F | M/Trans(M39) Calif, 3.45(GM3) | 16071137 | 1139ACYD |
| 1987 | 5.7-8 | A/Trans(M39) Fed, 3.27(GW6) | 16068654 | 8656ABWN |
| 1988 | 5.0-F | A/Trans(M39) Fed, 2.73(GU2) | 16082173 | 2174AKFM |
| 1988 | 5.0-F | A/Trans(M39) Fed, 3.23(GU5) | 16082183 | 2184AKFP |
| 1988 | 5.0-F | A/Trans(M39) Calif, 2.73(GU2) | 16082439 | 2440AKFZ |
| 1988 | 5.0-F | A/Trans(M39) Calif, 3.23(GU5) | 16082448 | 2449AKHB |
| 1988 | 5.0-F | M/Trans(M39) Fed, 3.08(GU4) | 16082388 | 2389AKFT |
| 1988 | 5.0-F | M/Trans(MK6) Fed, 3.45(GM3) | 16082422 | 2423AKFW 6423ANPJ |
| 1988 | 5.0-F | M/Trans(M39) Calif, 3.08(GU4) | 16082462 | 2463AKHF |
| 1988 | 5.0-F | M/Trans(MK6) Calif, 3.45(GM3) | 16082470 | 2472AKHJ |
| 1988 | 5.7-8 | A/Trans(MD8) Fed, 2.77(GH3) | 16075399 | 5400ABYA |
| 1988 | 5.7-8 | A/Trans(MD8) Fed, 3.27(GW6) | 16083268 | 3269AKXX |
| 1989 | 5.0-F | A/Trans(MD8) Fed, 2.77(GH3), 2.73(GU2) |
16129297 | 9298ANYH |
| 1989 | 5.0-F | A/Trans(MD8) Calif, 2.77(GH3), 2.73(GU2) |
16129383 | 9384ANYZ |
| 1989 | 5.0-F | M/Trans(M39) Fed, 3.08(GU4) | 16129337 | 9338ANYR |
| 1989 | 5.0-F | M/Trans(MK6) Fed, 3.45(GM3) | 16129349 | 9350ANYS |
| 1989 | 5.0-F | M/Trans(MK6) Calif, 3.45(GM3) | 16129359 | 9360ANYT |
| 1989 | 5.0-F | M/Trans(M39) Calif, 3.08(GU4) | 16129365 | 9366ANYU |
| 1989 | 5.7-8 | A/Trans(MD8) Fed, 2.77(GH3) | 16129303 | 9303ANYJ |
| 1989 | 5.7-8 | A/Trans(MD8) Fed, 3.27(GW6) | 16129307 | 9308ANYK |
Resistor Pack Cross Reference
Reference:
Ludis’ Home Page
| 14 Pin | 16 Pin | Year(s) | Engine | Options (RPO) |
ECM | Sample Prom Codes |
|---|---|---|---|---|---|---|
| 16035010 | 16035011 | 1986 | 2.0-P | M/Trans, TBI (LQ5) |
1227165 | CRY, CRZ |
| 16055375 | 16055376 | 1987-88 | 5.0-F | TPI (LB9) | 1227165 | |
| 16055375 | 16055376 | 1987-88 | 5.7-8 | TPI (L98) |
1227165 | ABYA |
| 16057556 | 16057557 | 1987 | 2.0-1 | TBI (LL8) |
1227730 | FML, AAST, ADDT, ADDU |
| 16060898 | 16060900 | 1987-91 | 2.5-E | Truck TBI (LN8) |
1227165 | ADHF, AMJW, ASWY, AXAA |
| 16060898 | 16060900 | 1990 | 2.5-R | TBI (LR8) | 1227727 | APTW |
| 16060954 | 16060956 | 1987-89 | 2.8-W | PFI (LB6) |
1227727
1227730 |
AAWW, AAXM, ADBT, ADBU, ADCM, ADPK, ADPL, ADRX, ADRZ, ALZN, ALZT, AMAP, ANKK, ANWA, APWD, APWM, ARBX, ARCN, ARYH, ARXU, ASMK, ASMW, ASMX, ASNA, ASNB, ASWD, ATRA, ATZF |
| 16060954 | 16060956 | 1989-90 | 3.1-T | PFI (LH0) | 1227727 | ARCX, ARZW, ATSN, ATSP |
| 16072665 | 16072667 | 1989 | 5.0-F | TPI (LB9) |
1227165 | |
| 16072665 | 16133420 | 1989 | 5.7-8 | TPI (L98) |
1227165 | ARAR, AUJM |
| 16080140 | 16080142 | Austrailian V8 |
||||
| 16087223 | 16087224 | 3.8 | Austrailian V6 |
1227808 | ATFY | |
| 16088733 | 16088735 | 1990-91 | 3.1-T | PFI (LH0) |
1227730 | AUAR, AUMY |
I am trying to find a prom for my 86 S-15. Number on the prom JM2532E/02667 computer 126864. Vin 1GTBS14E3G250476S. Any idea where I can find one? Thanks Lee Parmeter Biloxi, Ms
Buenas tardes una pregunta ando buscando un men-call Chevrolet para cavalier Z24 modelo 1991 Mexico no es USA. con terminacion de mem-call AWAK .. o ECM 7730 incluido para ese modelo ya que han checado otro modelos y no funciona el coche …. espero sus comentarios …gracias