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Cannot get data from 1987 ecm

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Old 10-09-2016, 09:55 AM
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Car: 1987 Firebird Formula
Engine: Carbureted - 305
Transmission: 700R4
Cannot get data from 1987 ecm

Hi All,

I have a question on data logging. I have tried Tuner Pro RT and a few others and cannot get any data from my ecm. I have a 1987 formula with the LG4 engine and Quadrajet CCC carb.

I am not sure which ecm I have. I have tried the def files for the 1227165 ecm and it does not work. I have not physically gone to the ecm to see which number it has on it.

I have a new ecm that supposedly belongs to my type of car and its a 1228079. I cannot find any def file for that one.

I am using the Moates Aldu1 and Cabl1 to connect to my pc.

If anyone can offer assistance, I would appreciate it.

Thanks,

Louis
Old 10-09-2016, 10:11 AM
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Re: Cannot get data from 1987 ecm

The CCC ECMs only transmit data when in field service or diagnostic mode. I can't quite recall which, but need to either short pins A & B together or use a 10K resistor between them.

These pins A & B are on the ALDL connector.

Also, the '8079 ECM is mask ID $40

RBob.
Old 10-09-2016, 10:13 AM
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Re: Cannot get data from 1987 ecm

Just to add, try WinALDL. IIRC, it has the data stream definition for the CCC ECMs.

RBob.
Old 10-09-2016, 10:29 AM
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Car: 1987 Firebird Formula
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Re: Cannot get data from 1987 ecm

Originally Posted by RBob
Just to add, try WinALDL. IIRC, it has the data stream definition for the CCC ECMs.

RBob.

Hello Rob, thanks for the quick response. I will try that this afternoon. The moates cable that I have does have the 10k resister option.

Note: just looked through Tuner Pro definations and cannot find the $40. Any idea where I can find it?

Louis

Last edited by siuol; 10-09-2016 at 10:34 AM. Reason: new question
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