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Are some ECMs better than others?

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Old 04-29-2012, 09:40 AM
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Are some ECMs better than others?

1227747 computer. I would think that the best computer for a vehicle would be the computer that came with the vehicle and that the only adjustments you would want to make would be with the PROM.

Does that make sense?
Old 04-29-2012, 10:30 AM
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Re: Are some ECMs better than others?

Originally Posted by unckybob
1227747 computer. I would think that the best computer for a vehicle would be the computer that came with the vehicle and that the only adjustments you would want to make would be with the PROM.

Does that make sense?
Yes & no. In the C3 series of TBI ECMs, which ALL have the same hardware, the firmware is different. An example is that the '7747 firmware doesn't support an IAT, while the '8746 ECM does.

The PROM contains the calibration and some code. With the remaining code (firmware) is in mask ROM on board the ECM.

RBob.
Old 05-02-2012, 11:36 PM
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Re: Are some ECMs better than others?

Originally Posted by unckybob
1227747 computer. I would think that the best computer for a vehicle would be the computer that came with the vehicle and that the only adjustments you would want to make would be with the PROM.

Does that make sense?
I disagree, the EBL or even the later Blue/Red connector PCM would be a much welcomed replacement to the 7747. Even a 92 only 299 is a better platform.
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