Need ECM help.
Can an ECM out of a 2001 DODGE 2500 with a 5.9, 5 speed manual transmission be reflashed (programed) to replace an ECM on a 2001 DODGE 3500, 6 speed manual transmission with an HO Cummins engine? Both ECM's have the same Cummins part number (3947412).
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I don’t know what software differences there would be for a extra gear and a few extra leaves in the pack . I’m guessing that’s why the same part number.
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Hmm, I am pretty sure there is a difference between the standard and HO because I had to wait a week in Montana to get an HO ecm overnighted from Michigan to get my truck up and running...but that doesn't mean they couldn't be fooled with by a computer literate guy.....the dealership just couldn't do it or I'm guessing they would have, they had 2 non HO ecm's in stock.
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The HO motor uses a different injection pump and the motor runs a higher compression ratio that the SO motors.
I would guess the computers would be different. It would also guess that it would be able to be re flashed, but that would be a question for the guys who you would ask to re-flash it. |
Originally Posted by Hawkeye
(Post 3361936)
Can an ECM out of a 2001 DODGE 2500 with a 5.9, 5 speed manual transmission be reflashed (programed) to replace an ECM on a 2001 DODGE 3500, 6 speed manual transmission with an HO Cummins engine? Both ECM's have the same Cummins part number (3947412).
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Originally Posted by Hawkeye
(Post 3362074)
I installed the ECM for 5 speed manual transmission today. It started right up on the first try. All the gauges and cruise control are working. I would like to get the ECM flashed for my HO with 6 speed manual transmission but it is running a lot better than I expected.
Maybe you would not want the re-flash... I remember when the HO came out that folks put on SO VP44s to get a nice boost in performance over the HO. So if it runs good and does not smoke.. why change it? |
That's interesting info....I remember the HO guys going with SO pumps for more fuel flow or something like that, easier to hot rod or such...
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Originally Posted by Hawkeye
(Post 3362074)
I installed the ECM for 5 speed manual transmission today. It started right up on the first try. All the gauges and cruise control are working. I would like to get the ECM flashed for my HO with 6 speed manual transmission but it is running a lot better than I expected.
Thanks! Randy. |
ECM programming info regarding ECM replacements:
TSB 18-019-02A There seems to be six versions of the firmware in the ECM which depends on two criteria: 1 - Emissions - 49 state (Federal) or California 2 - Transmission - Auto, 5 speed, or 6 speed |
Originally Posted by Western Rammer
(Post 3363576)
Define "a lot better than expected" if you would. I'm stuck in limp mode due to a failed ECM in my '02 HO 6 spd and having trouble finding a replacement. That would possibly make the search much easier.
Thanks! Randy. |
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