: Tune a 4.1?



murrayII
01-08-07, 11:54 PM
Hey, I just stepped over from the world of Hondas.. Im a little surprised to know somebody here is actually working on tunes for our cars..

I figured the newer cads would have some engine management potential.. but the 4.1? is there potential? are people hacking the ecu and making fuel maps? it would be pretty cool to get a little more pep out of the lackluster 4.1

I figured it would be all about "old school" hot rodding.. swappin carbs.. and doing engine work.. or swaps.. but if you can change the maps a bit, and maybe the shift points for the tranny.. that would be really cool..

Ive got an 85 fleetwood.. whats the good word on tuning it?


later

Murray

N0DIH
01-10-07, 08:34 AM
Currently I don't think there is any tuning abilities for it. It IS very possible, but someone would need to read the .bin file from the PROM and have someone dissect it.

Currently the 90-93 L05 350's are tunable, the 90-93 L03's (305's) and the 94-95 LT1's. The tuning program is TunerProRT or TunerCat. I use TunerCat (www.tunercat.com). I don't know if a definition file has been created for the 4.1L/4.5L/4.9L yet, but I haven't seen one. If you are into playing, you can work on creating one. It isn't simple plug and play, or someone would have done it by now. Being I don't have a car with that engine, I can't play.

Only the 94-up RWD Cadillacs had a tunable transmission. The 91-up FWD's do also. But no tuning for the FWD yet.

It is doable, but willl take some time. There is one company who does offer tuning for the 4.x V8s, but I don't remember who. I don't know what they can do for it. I am surprised no one has hacked it by now. But I guess the hackers don't drive Cadillacs!

illumina
01-11-07, 11:24 PM
I'm working on a solution for hacking the 4.x series engines. Stay tuned!

Tom, I had some questions I wanted to ask ya, but you're never logged into AOL anymore. I'll PM you or email you about it perhaps.

N0DIH
01-11-07, 11:52 PM
I can't seem to get my PW to work there unless I am on my Mac, which I don't use as often as my PC Laptop.

I'll PM you my email

limo1
03-22-16, 12:48 AM
Here is a dump file my 4.1 ECM 1985 fleetwood not sure if it will all fit but here goes:
Cadillac 4.1L front drive motor Fleetwood Binary
ECM 1226462
Firmware version P1.3----215 This is latest for these ECU from Aldata site
Firmware label HMC 2277
Prom 32kbit
2732 EPROM or equiv.

ECM should have 2 Quad driver IC's replaced on IO board with part # UDN2559BT
OEM have crap Quad drivers that blow or short to easy. Old part # DELCO 8549 274 Z 24824B [SN75437A/DS3658/DS3668 Quad Driver]
these have protected outputs so will not blow when solenoids short or pulse EMF back
see picture or replacement locations.

Prom HMC2277 4K Byte HEX dump


Here is the hex dump starting at address 0000-0FFF

0 1 2 3 4 5 6 7 8 9 A B C D E F
-----------------------------------------------
01 91 10 9C 16 C0 58 08 FF E8 C4 AF A0 94 89 80
77 6F 66 5E 55 49 3D 2A 00 00 1A 04 08 23 91 AA
BE C8 C8 C8 C8 4C CD 08 05 08 19 32 41 46 46 46
46 46 08 07 3F 5F 76 91 AD C6 DF FF C8 5C 59 55
55 54 4A 43 3E 32 25 1F 1B 19 19 19 19 19 62 CC
E6 EC F9 FF 08 0F 50 93 14 03 78 0C 0D 10 16 25
47 56 5C 63 68 6E 78 78 05 05 09 0D 10 1C 1E 28
32 2D 29 29 02 00 0F 14 19 19 74 00 00 00 00 00
00 00 78 DA DA C0 B9 BE D4 D2 E7 EA EA E7 99 78
52 57 5C 61 6A 72 76 7A 7B 7D 7D 7D A8 0F 0F 0F
0F 0F 0F 0F 0F 0A 0A 0A 07 03 00 00 00 00 A8 14
14 14 14 14 14 14 14 14 0E 07 00 00 00 00 00 00
78 80 80 80 80 80 80 80 80 80 80 80 80 9E 93 7E
62 08 08 05 06 06 00 78 5D 5E 61 66 6C 71 74 7B
83 84 84 89 62 5E 5E 7D 6D 6D 78 51 4D 3E 31 28
23 1C 1A 1E 1E 1D 0C 28 96 11 01 93 10 74 33 33
2E 1C 0E 09 05 03 E8 7C 0A 05 01 6C 94 00 78 88
A8 C8 FF 40 D7 28 30 40 50 FF FF 62 96 8F 86 81
80 8E 1D BD C4 D4 C3 B2 A2 95 8E 8A 87 83 FF 80
90 E0 FF 44 40 20 40 78 04 19 19 13 0D 0A 07 05
04 03 A2 08 05 03 01 00 01 01 5F A8 00 42 20 C8
03 28 12 67 D4 01 01 01 04 06 07 08 08 08 1E 93
1E 04 08 0A 0C 18 3A 43 48 4B 4C 12 03 C4 C1 C1
C3 CA E6 F7 FC FF FF 02 28 A0 A0 A0 A0 0A 3A 23
1E 03 20 01 00 99 35 C3 9C 78 64 6D 85 32 19 26
FE F1 4D 61 71 A0 62 57 64 64 6D 6D B3 F3 00 00
00 00 00 28 28 28 28 1E 2D 2D 2D 2D 23 2D 2D 32
2D 28 2D 2D 32 32 2A 2D 2D 32 34 2D 2D 2D 32 37
2D 2D 2D 32 37 2A 2D 2D 32 37 28 08 00 00 00 00
05 07 07 08 08 08 08 08 0C 0F 0F 0F 0F 08 00 00
00 00 04 06 08 0A 0A 0F 14 19 19 19 19 19 19 FF
FF FF FF FF FF FF FF FF FF 80 28 22 6E 6E 6E 73
73 22 A0 9F 9E 9D 9C 0B B8 00 02 28 32 0A 0F 0F
14 19 84 A0 8C 64 59 40 2E 2E 31 36 0F 61 0F 0C
00 84 08 10 17 26 26 26 17 17 17 00 05 38 20 32
1E 23 23 30 38 28 84 A0 9B 7C 64 5D 50 50 64 6C
28 82 FA 38 1E 1E 1E 82 40 08 06 04 06 82 50 3C
14 14 14 D4 32 14 20 88 A4 A0 9C 94 81 72 6B 67
5A 52 4F 4F 4F 4F 51 56 56 02 41 42 45 48 4B 4F
48 52 48 08 08 00 00 00 07 07 07 08 09 0A 0A 0A
0A 0A 0A 0A 0A 0F 08 00 00 00 00 00 00 0A 0F 14
1E 1E 1E 1E 1E 1E 1E 1E 64 05 78 8D 8D 8D 8D C8
F3 F3 F3 F3 F3 F3 FF 05 48 07 55 A0 08 02 03 04
08 00 00 04 05 08 0A 0A 0A 0C 0F 11 14 16 19 1B
1E 23 03 07 A0 0E 03 0F 0C F7 69 64 5E 5E 47 22
1C 1C 1A 69 64 5E 5E 47 22 1C 1C 1A 6C 69 5E 5E
47 22 1C 1C 1A 6C 66 61 50 39 33 1C 1A 1A 6C 69
64 53 3C 33 1F 1F 1C 6C 69 66 53 3C 33 28 22 22
6F 6C 69 53 3C 33 2E 28 28 6F 6C 69 53 41 36 2E
2B 2B 6F 6C 6C 58 44 44 44 44 44 6F 6C 6C 55 55
55 55 55 55 F7 2E 28 1F 0E 06 00 00 00 00 2B 2B
25 1C 06 00 00 00 00 2B 2B 25 1C 06 00 00 00 00
36 33 30 1A 0E 03 00 00 00 3C 39 33 1C 11 09 03
00 00 41 3F 36 1F 14 14 0E 0B 0B 41 3F 36 2E 29
22 1A 1A 1A 41 41 39 2E 28 22 22 22 1F 53 50 44
39 30 2E 2E 2E 2E 5E 5B 4D 41 3C 3C 3C 3C 3C 1C
6E 01 1C 61 34 75 ED 0A 88 50 50 50 47 39 2B 2B
2B 2B 2B 2B 2B 28 25 1F 1F 1F 08 22 17 11 09 06
01 E6 C0 9A 62 00 E6 CD 4D 00 02 00 04 02 03 03
08 98 37 1A FF 78 82 87 97 9D 9D 9D A1 A1 A4 A6
AA AE B3 B9 C4 CB 78 82 87 97 9D 9D 9D A1 A1 A4
A6 AA AE B3 B9 C4 CB 78 82 92 97 A0 A4 A5 A6 A7
A9 AC AF B4 BA BF CD CD 78 82 94 9E A3 A6 A9 AB
AD B0 B3 B5 B6 BA BF CF CF 78 82 99 A4 A9 AB AD
AF B3 B9 BB BC BD BF C4 D2 D2 78 82 A2 A7 AB AD
B0 B3 B7 BC BD BF C0 C2 C5 D2 D2 78 82 A4 A9 AD
AF B2 B5 B9 BE BF C0 C2 C4 C6 D2 D2 82 82 A7 AB
AE B1 B3 B6 BA BF C0 C1 C3 C5 C7 D2 D2 84 84 AA
AD B1 B2 B4 B7 BB C0 C2 C3 C4 C6 C8 CF CF 86 86
AD AF B2 B3 B5 B8 BC C1 C3 C4 C5 C7 C9 CB CB 87
87 B0 B2 B4 B5 B7 BA BD C2 C4 C5 C6 C8 CB CB CB
87 87 B4 B6 B8 B9 BA BB BD C2 C3 C5 C6 C7 C8 C8
C8 87 87 B4 BB BC BC BC BC BC BF C0 C1 C1 C1 C1
C1 C1 87 87 B1 B1 B1 B1 B1 B1 B1 B1 B2 B4 B9 BE
C0 C0 C0 87 87 A7 A7 A7 A7 A7 A7 A7 AC AC B1 B6
BB BB BB BB FE 2D B2 2D 24 24 24 24 C4 A3 A3 A3
A3 83 51 51 51 51 B8 FE FE FE FE FE FE FE FE FE
FE FE FE FE FE FE 05 5C 34 17 B8 17 17 17 17 17
17 17 17 17 17 17 17 17 17 17 B8 18 20 25 2B 34
3C 46 4A 4A 4A 4A 4A 4A 4A 4A B8 1E 1E 1E 1E 1E
1E 1E 1E 1E 1E 1E 1E 1E 1E 1E B8 23 23 23 23 23
23 23 23 23 23 23 23 23 23 23 04 13 01 9E 85 0A
20 22 24 17 13 13 13 08 41 41 8C E6 83 5F 4C 4B
46 40 25 E1 00 08 13 AF 6B DD BE 8B BE 23 1E 13
26 04 FD EB 05 F7 07 32 FB FB BA 78 D1 C1 9F C0
6E 14 A0 64 14 AA 05 A4 C8 10 00 10 1C 20 03 18
01 38 28 13 3C 39 26 14 29 30 8F 16 5D BB 2F 02
0A 05 A8 04 0A 11 07 0A 32 10 63 21 03 00 04 32
2D 20 A0 26 AB 0B 08 6D 00 08 50 00 00 20 00 40
DF D7 1D 35 E9 35 EA 01 39 01 3A 01 3B 01 3C 01
3D 01 37 01 38 00 1A 00 25 00 22 01 12 00 17 00
14 01 13 01 14 01 15 01 16 01 17 01 18 01 19 01
1A 01 1B 01 1C 01 1D 00 0A 00 06 01 10 0C 00 09
00 0B 00 07 00 08 00 1B 00 4F 00 20 00 58 00 AF
00 48 00 49 88 80 1A 00 C1 08 30 39 01 01 39 01
01 39 01 01 39 01 01 39 01 01 39 01 01 7E 37 1D
39 01 01 39 01 01 39 01 01 01 6E 00 7E D6 F7 7E
38 2C 7E EF D3 7E F5 86 7E F5 FB 7E F7 13 7E 37
98 7E F7 B5 7E F8 2E 7E FC 7E 7E 38 66 7E 37 06
7E 37 6D 7E 3F CD 7E 3B A5 7E E0 48 7E 3C 1B 7E
3F E2 7E DD 12 7E 38 1E 7E DF A2 7E FF 22 7E FF
22 7E FE C3 7E FE C3 7E FE 2D 7E FE 2D 7E 3D F5
7E EA 36 7E EC 0C 7E 39 20 7E EB DF 7E 3E D0 7E
36 B5 39 01 01 39 01 01 39 01 01 7E 3A C3 7E E2
DC 7E 37 A6 7E EC E3 FE 58 00 8C AA 55 26 03 7E
58 02 39 0A 7F 06 7B 9A 08 40 0A 05 05 32 07 0A
0F 0F 14 08 00 00 03 04 06 07 07 07 07 07 08 09
0A 0A 0A 0C 14 CE 33 A4 BD FE 2D B7 02 00 CE 31
96 BD FE 2D B7 02 01 96 0E 85 08 26 13 96 22 81
4D 25 07 86 FF B7 01 2C 20 06 CE 00 64 FF 01 2A
CE 34 BC BD FE 2D B7 02 02 CE 30 D0 BD FE 2D B7
02 03 CE 30 74 96 B3 BD FE 2D B7 02 04 B6 02 07
B7 02 07 7E DA 2F BD F0 6F 96 DF 81 33 26 0D D6
DE C1 02 26 07 D6 E2 26 03 7E FB 79 39 36 37 B6
01 3E 85 01 27 04 96 0E 20 12 C6 64 96 0E 85 02
27 02 C0 13 84 FD D1 1A 22 19 8A 02 C6 26 85 40
27 02 C0 02 8A 40 D1 AF 23 09 84 BF 97 0E 33 CA
10 20 03 97 0E 33 32 39 37 5C 00 FF 04 05 01 01
82 90 87 1A 05 FF 90 86 1A E4 FF FE 07 96 0D 84
20 36 BD E0 59 96 7E D6 0D C4 20 30 E1 00 2B 08
F6 01 29 27 0A 5A 20 09 C6 CC 3D C6 78 20 02 86
FF F7 01 29 97 7E 32 39 BD F7 6D 8C F4 B2 26 05
37 BD F7 B5 33 39 BD 38 11 BD D3 3F 96 52 27 06
96 02 8A 20 97 02 B6 02 0C 26 26 D6 1F 17 CB 0D
25 05 F1 02 0B 23 18 81 2F 23 1A 96 58 8B 04 B1
02 0A 22 11 86 28 97 E5 DC 40 C3 01 48 DD 40 86
14 4A B7 02 0C 96 58 B7 02 0A D6 1F F7 02 0B B1
31 FA 24 0F F6 01 1F 17 D8 0E C5 80 27 05 84 7F
01 91 10 9C 16 C0 58 08 FF E8 C4 AF A0 94 89 80
77 6F 66 5E 55 49 3D 2A 00 00 1A 04 08 23 91 AA
BE C8 C8 C8 C8 4C CD 08 05 08 19 32 41 46 46 46
46 46 08 07 3F 5F 76 91 AD C6 DF FF C8 5C 59 55
55 54 4A 43 3E 32 25 1F 1B 19 19 19 19 19 62 CC
E6 EC F9 FF 08 0F 50 93 14 03 78 0C 0D 10 16 25
47 56 5C 63 68 6E 78 78 05 05 09 0D 10 1C 1E 28
32 2D 29 29 02 00 0F 14 19 19 74 00 00 00 00 00
00 00 78 DA DA C0 B9 BE D4 D2 E7 EA EA E7 99 78
52 57 5C 61 6A 72 76 7A 7B 7D 7D 7D A8 0F 0F 0F
0F 0F 0F 0F 0F 0A 0A 0A 07 03 00 00 00 00 A8 14
14 14 14 14 14 14 14 14 0E 07 00 00 00 00 00 00
78 80 80 80 80 80 80 80 80 80 80 80 80 9E 93 7E
62 08 08 05 06 06 00 78 5D 5E 61 66 6C 71 74 7B
83 84 84 89 62 5E 5E 7D 6D 6D 78 51 4D 3E 31 28
23 1C 1A 1E 1E 1D 0C 28 96 11 01 93 10 74 33 33
2E 1C 0E 09 05 03 E8 7C 0A 05 01 6C 94 00 78 88
A8 C8 FF 40 D7 28 30 40 50 FF FF 62 96 8F 86 81
80 8E 1D BD C4 D4 C3 B2 A2 95 8E 8A 87 83 FF 80
90 E0 FF 44 40 20 40 78 04 19 19 13 0D 0A 07 05
04 03 A2 08 05 03 01 00 01 01 5F A8 00 42 20 C8
03 28 12 67 D4 01 01 01 04 06 07 08 08 08 1E 93
1E 04 08 0A 0C 18 3A 43 48 4B 4C 12 03 C4 C1 C1
C3 CA E6 F7 FC FF FF 02 28 A0 A0 A0 A0 0A 3A 23
1E 03 20 01 00 99 35 C3 9C 78 64 6D 85 32 19 26
FE F1 4D 61 71 A0 62 57 64 64 6D 6D B3 F3 00 00
00 00 00 28 28 28 28 1E 2D 2D 2D 2D 23 2D 2D 32
2D 28 2D 2D 32 32 2A 2D 2D 32 34 2D 2D 2D 32 37
2D 2D 2D 32 37 2A 2D 2D 32 37 28 08 00 00 00 00
05 07 07 08 08 08 08 08 0C 0F 0F 0F 0F 08 00 00
00 00 04 06 08 0A 0A 0F 14 19 19 19 19 19 19 FF
FF FF FF FF FF FF FF FF FF 80 28 22 6E 6E 6E 73
73 22 A0 9F 9E 9D 9C 0B B8 00 02 28 32 0A 0F 0F
14 19 84 A0 8C 64 59 40 2E 2E 31 36 0F 61 0F 0C
00 84 08 10 17 26 26 26 17 17 17 00 05 38 20 32
1E 23 23 30 38 28 84 A0 9B 7C 64 5D 50 50 64 6C
28 82 FA 38 1E 1E 1E 82 40 08 06 04 06 82 50 3C
14 14 14 D4 32 14 20 88 A4 A0 9C 94 81 72 6B 67
5A 52 4F 4F 4F 4F 51 56 56 02 41 42 45 48 4B 4F
48 52 48 08 08 00 00 00 07 07 07 08 09 0A 0A 0A
0A 0A 0A 0A 0A 0F 08 00 00 00 00 00 00 0A 0F 14
1E 1E 1E 1E 1E 1E 1E 1E 64 05 78 8D 8D 8D 8D C8
F3 F3 F3 F3 F3 F3 FF 05 48 07 55 A0 08 02 03 04
08 00 00 04 05 08 0A 0A 0A 0C 0F 11 14 16 19 1B
1E 23 03 07 A0 0E 03 0F 0C F7 69 64 5E 5E 47 22
1C 1C 1A 69 64 5E 5E 47 22 1C 1C 1A 6C 69 5E 5E
47 22 1C 1C 1A 6C 66 61 50 39 33 1C 1A 1A 6C 69
64 53 3C 33 1F 1F 1C 6C 69 66 53 3C 33 28 22 22
6F 6C 69 53 3C 33 2E 28 28 6F 6C 69 53 41 36 2E
2B 2B 6F 6C 6C 58 44 44 44 44 44 6F 6C 6C 55 55
55 55 55 55 F7 2E 28 1F 0E 06 00 00 00 00 2B 2B
25 1C 06 00 00 00 00 2B 2B 25 1C 06 00 00 00 00
36 33 30 1A 0E 03 00 00 00 3C 39 33 1C 11 09 03
00 00 41 3F 36 1F 14 14 0E 0B 0B 41 3F 36 2E 29
22 1A 1A 1A 41 41 39 2E 28 22 22 22 1F 53 50 44
39 30 2E 2E 2E 2E 5E 5B 4D 41 3C 3C 3C 3C 3C 1C
6E 01 1C 61 34 75 ED 0A 88 50 50 50 47 39 2B 2B
2B 2B 2B 2B 2B 28 25 1F 1F 1F 08 22 17 11 09 06
01 E6 C0 9A 62 00 E6 CD 4D 00 02 00 04 02 03 03
08 98 37 1A FF 78 82 87 97 9D 9D 9D A1 A1 A4 A6
AA AE B3 B9 C4 CB 78 82 87 97 9D 9D 9D A1 A1 A4
A6 AA AE B3 B9 C4 CB 78 82 92 97 A0 A4 A5 A6 A7
A9 AC AF B4 BA BF CD CD 78 82 94 9E A3 A6 A9 AB
AD B0 B3 B5 B6 BA BF CF CF 78 82 99 A4 A9 AB AD
AF B3 B9 BB BC BD BF C4 D2 D2 78 82 A2 A7 AB AD
B0 B3 B7 BC BD BF C0 C2 C5 D2 D2 78 82 A4 A9 AD
AF B2 B5 B9 BE BF C0 C2 C4 C6 D2 D2 82 82 A7 AB
AE B1 B3 B6 BA BF C0 C1 C3 C5 C7 D2 D2 84 84 AA
AD B1 B2 B4 B7 BB C0 C2 C3 C4 C6 C8 CF CF 86 86
AD AF B2 B3 B5 B8 BC C1 C3 C4 C5 C7 C9 CB CB 87
87 B0 B2 B4 B5 B7 BA BD C2 C4 C5 C6 C8 CB CB CB
87 87 B4 B6 B8 B9 BA BB BD C2 C3 C5 C6 C7 C8 C8
C8 87 87 B4 BB BC BC BC BC BC BF C0 C1 C1 C1 C1
C1 C1 87 87 B1 B1 B1 B1 B1 B1 B1 B1 B2 B4 B9 BE
C0 C0 C0 87 87 A7 A7 A7 A7 A7 A7 A7 AC AC B1 B6
BB BB BB BB FE 2D B2 2D 24 24 24 24 C4 A3 A3 A3
A3 83 51 51 51 51 B8 FE FE FE FE FE FE FE FE FE
FE FE FE FE FE FE 05 5C 34 17 B8 17 17 17 17 17
17 17 17 17 17 17 17 17 17 17 B8 18 20 25 2B 34
3C 46 4A 4A 4A 4A 4A 4A 4A 4A B8 1E 1E 1E 1E 1E
1E 1E 1E 1E 1E 1E 1E 1E 1E 1E B8 23 23 23 23 23
23 23 23 23 23 23 23 23 23 23 04 13 01 9E 85 0A
20 22 24 17 13 13 13 08 41 41 8C E6 83 5F 4C 4B
46 40 25 E1 00 08 13 AF 6B DD BE 8B BE 23 1E 13
26 04 FD EB 05 F7 07 32 FB FB BA 78 D1 C1 9F C0
6E 14 A0 64 14 AA 05 A4 C8 10 00 10 1C 20 03 18
01 38 28 13 3C 39 26 14 29 30 8F 16 5D BB 2F 02
0A 05 A8 04 0A 11 07 0A 32 10 63 21 03 00 04 32
2D 20 A0 26 AB 0B 08 6D 00 08 50 00 00 20 00 40
DF D7 1D 35 E9 35 EA 01 39 01 3A 01 3B 01 3C 01
3D 01 37 01 38 00 1A 00 25 00 22 01 12 00 17 00
14 01 13 01 14 01 15 01 16 01 17 01 18 01 19 01
1A 01 1B 01 1C 01 1D 00 0A 00 06 01 10 0C 00 09
00 0B 00 07 00 08 00 1B 00 4F 00 20 00 58 00 AF
00 48 00 49 88 80 1A 00 C1 08 30 39 01 01 39 01
01 39 01 01 39 01 01 39 01 01 39 01 01 7E 37 1D
39 01 01 39 01 01 39 01 01 01 6E 00 7E D6 F7 7E
38 2C 7E EF D3 7E F5 86 7E F5 FB 7E F7 13 7E 37
98 7E F7 B5 7E F8 2E 7E FC 7E 7E 38 66 7E 37 06
7E 37 6D 7E 3F CD 7E 3B A5 7E E0 48 7E 3C 1B 7E
3F E2 7E DD 12 7E 38 1E 7E DF A2 7E FF 22 7E FF
22 7E FE C3 7E FE C3 7E FE 2D 7E FE 2D 7E 3D F5
7E EA 36 7E EC 0C 7E 39 20 7E EB DF 7E 3E D0 7E
36 B5 39 01 01 39 01 01 39 01 01 7E 3A C3 7E E2
DC 7E 37 A6 7E EC E3 FE 58 00 8C AA 55 26 03 7E
58 02 39 0A 7F 06 7B 9A 08 40 0A 05 05 32 07 0A
0F 0F 14 08 00 00 03 04 06 07 07 07 07 07 08 09
0A 0A 0A 0C 14 CE 33 A4 BD FE 2D B7 02 00 CE 31
96 BD FE 2D B7 02 01 96 0E 85 08 26 13 96 22 81
4D 25 07 86 FF B7 01 2C 20 06 CE 00 64 FF 01 2A
CE 34 BC BD FE 2D B7 02 02 CE 30 D0 BD FE 2D B7
02 03 CE 30 74 96 B3 BD FE 2D B7 02 04 B6 02 07
B7 02 07 7E DA 2F BD F0 6F 96 DF 81 33 26 0D D6
DE C1 02 26 07 D6 E2 26 03 7E FB 79 39 36 37 B6
01 3E 85 01 27 04 96 0E 20 12 C6 64 96 0E 85 02
27 02 C0 13 84 FD D1 1A 22 19 8A 02 C6 26 85 40
27 02 C0 02 8A 40 D1 AF 23 09 84 BF 97 0E 33 CA
10 20 03 97 0E 33 32 39 37 5C 00 FF 04 05 01 01
82 90 87 1A 05 FF 90 86 1A E4 FF FE 07 96 0D 84
20 36 BD E0 59 96 7E D6 0D C4 20 30 E1 00 2B 08
F6 01 29 27 0A 5A 20 09 C6 CC 3D C6 78 20 02 86
FF F7 01 29 97 7E 32 39 BD F7 6D 8C F4 B2 26 05
37 BD F7 B5 33 39 BD 38 11 BD D3 3F 96 52 27 06
96 02 8A 20 97 02 B6 02 0C 26 26 D6 1F 17 CB 0D
25 05 F1 02 0B 23 18 81 2F 23 1A 96 58 8B 04 B1
02 0A 22 11 86 28 97 E5 DC 40 C3 01 48 DD 40 86
14 4A B7 02 0C 96 58 B7 02 0A D6 1F F7 02 0B B1
31 FA 24 0F F6 01 1F 17 D8 0E C5 80 27 05 84 7F
-----------------------------------------------
$FF0 $FFF
Endo of file 32kb eprom

Mosey2001
08-19-16, 04:54 PM
Has anyone found a source to get replacement PROM chip for an 84 eldorado?

I know that this post is 9 years old however it is a great topic. and even more relevant now. Is there anyone else out there interested in this?

Submariner409
08-19-16, 05:09 PM
Why? The 4.1 was - and is - a pig. Yes, it moves the car around town, but it has as much potential for a "tune" as a 5 hp Briggs&Stratton.

Better to do a swap to more cubes.

Maybe theres a reason that this thread - and several other similar ones - in Engines, 4.X have died.