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Old 05-13-2008, 09:52 AM   #1 (permalink)
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Anyone using this Buick ECM?

I friend wants to sell off some of his parts and has an ECM for sale. The GM part number is 1226461. He said it will work in our cars with the correct chips but i haven't found anything to support it. I know our ECM's are in other 80's cars but they have the same part number where this one is different. Anybody have any input on this?
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Old 05-13-2008, 10:02 AM   #2 (permalink)
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I doubt that one will have all the functions to run our cars. here is the list for

GN ECM pn# 1227148 Here is a listing of all that use it:

1989 PONTIAC FIREBIRD TRANS AM V6 3.8L 231cid GAS FI T Engine VIN = 7
1989 PONTIAC FIREBIRD TRANS AM GTA SE V6 3.8L 231cid GAS FI T Engine VIN = 7
1987 BUICK REGAL GRAND NATIONAL V6 3.8L 231cid GAS FI T Engine VIN = 7
1987 BUICK REGAL LIMITED V6 3.8L 231cid GAS FI T Engine VIN = 7
1986 BUICK CENTURY CUSTOM V6 3.8L 231cid GAS FI N Engine VIN = 3
1986 BUICK CENTURY ESTATE WAGON V6 3.8L 231cid GAS FI N Engine VIN = 3
1986 BUICK CENTURY LIMITED V6 3.8L 231cid GAS FI N Engine VIN = 3
1986 BUICK CENTURY T-TYPE V6 3.8L 231cid GAS FI N Engine VIN = 3
1986 BUICK CENTURY V6 3.8L 231cid GAS FI N Engine VIN = B
1986 BUICK ELECTRA PARK AVENUE V6 3.8L 231cid GAS FI N Engine VIN = B
1986 BUICK ELECTRA T-TYPE V6 3.8L 231cid GAS FI N Engine VIN = B
1986 BUICK ELECTRA V6 3.8L 231cid GAS FI N Engine VIN = B
1986 BUICK LESABRE CUSTOM V6 3.8L 231cid GAS FI N Engine VIN = 3
1986 BUICK LESABRE LIMITED V6 3.8L 231cid GAS FI N Engine VIN = 3
1986 BUICK LESABRE V6 3.8L 231cid GAS FI N Engine VIN = B
1986 BUICK REGAL GRAND NATIONAL V6 3.8L 231cid GAS FI T Engine VIN = 7
1986 BUICK REGAL T-TYPE V6 3.8L 231cid GAS FI T Engine VIN = 7
1986 OLDSMOBILE 98 REGENCY V6 3.8L 231cid GAS FI N Engine VIN = B
1986 OLDSMOBILE 98 REGENCY BROUGHAM V6 3.8L 231cid GAS FI N Engine VIN = B
1986 OLDSMOBILE CUTLASS CIERA S V6 3.8L 231cid GAS FI N Engine VIN = 3
1986 OLDSMOBILE CUTLASS CIERA V6 3.8L 231cid GAS FI N Engine VIN = 3
1986 OLDSMOBILE DELTA 88 ROYALE V6 3.8L 231cid GAS FI N Engine VIN = 3
1986 OLDSMOBILE DELTA 88 ROYALE BROUGHAM V6 3.8L 231cid GAS FI N Engine VIN = 3
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Old 05-13-2008, 10:12 AM   #3 (permalink)
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A lot of the ECM's from that era look exactly the same but are filled with much different computer code depending on the car. I don't think you'll get a solid answer on this one. I was going to say try the ECM out but I have no idea if you could potentially damage something if it belongs to a different car.
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Old 05-13-2008, 11:02 AM   #4 (permalink)
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Thanks guys. That was the answers I was looking for.
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Old 05-13-2008, 12:20 PM   #5 (permalink)
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I dont think you would damage the car any by trying it out. I dont know what the difference would be. I show it fitting a 84-85 vintage SFI NA 3800 and those use the same sensors as the SFI turbo cars. The only thing I can think of that the NA doesn't use is a WG solenoid. I'm guessing the difference would have to be in the drivers.
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Old 05-13-2008, 12:40 PM   #6 (permalink)
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GM C3 ECM Crossreference



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Old 05-13-2008, 12:42 PM   #7 (permalink)
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Difference will probably be in the mask ROM, which contains a lot of the core strategies for fueling and such. That can't be changed without desoldering the ROM (and won't know what to do with a TR chip in the EEPROM, since things will be mapped differently, most likely).
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Old 05-13-2008, 12:49 PM   #8 (permalink)
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Also our cars use crank/cam sensors and I think 1226461 ecm is set up for HEI. This could also be a problem.
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Old 05-13-2008, 01:03 PM   #9 (permalink)
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Only the 1985 C-Body application uses HEI to fire the plugs. The 84-85 A-Body 3800 and 85 N-Body 3.0 use DIS. These are the only years and models that this particular ECM fits.
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Old 05-13-2008, 07:31 PM   #10 (permalink)
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That a CCC or P4 ECM? In the late 80's/early 90's Dave Buckshaw and I think Tom Chou played with putting a P4 ECM into a TR. The P4 had like 16x the processing power, and more room in the prom for extra cool code. I dont recall the specifics, but maybe you can find Dave and ask him about it, Maybe it will work

If its a CCC then no, it wont work.
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Old 05-14-2008, 10:18 AM   #11 (permalink)
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I tried an ECM of that type and it caused the Check Engine light to flash rapidly soon as I keyed on.
Didn't do any damage to the car, chip etc.
If you get it for free use it as a core trade in just clean the sticker off really well.
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