What if correct PCM or ECM # is not known? - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 09-05-2012, 12:02 PM Thread Starter
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What if correct PCM or ECM # is not known?

I am in a situation where I am not sure what to do next. I purchased a 2003 7.3 complete engine & 4R100 out of what was supposed to be a 2003 Ford E450 van (The engine does not have an intercooler) from a wrecking yard. Looking back now, I am not so sure what parts I have actually came from the same vehicle like they said. The engine is a 'reman' and the spec tag on the valve cover is damaged beyond reading any numbers. The engine/trans/etc. along with all wiring has been transplanted into a MDT and so I do not have the donor vehicle's VIN to reference off of either.

The engine swap now has between 40k-50k miles of service over the past 4 years and seemingly does OK but I have always wondered if there is an electrical wiring issue with the scan tool, --or whether maybe their is a problem with the ECM since there have been funny readings at times when they scanned. All my gauges (used instrument panel from E450 van) seem to work correctly, and the only known thing that does not work correctly is the Trans Overdrive does not dissengage by pressing the button on the end of the shift lever. It does seem to shift OK and the unit does go into O/D like normal.

I guess my question(s) is, if I were to send my ECM or ?? to someone to re-program, can they take what I have and give it a new baseline without knowing all the specs my engine or transmission are? If so, who would you send it to??

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post #2 of 2 Old 09-05-2012, 11:27 PM
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All the 7.3 should run off the whatever pcm strategy there is. The only time it is really important is when tuning the vehicle they have to know the correct strategy. The od button not working is probably something to do with the od button or the connection.

The only time there may be an issue is running a pcm strategy for a SD on an OBS motor but you would know that one pretty quick as the injectors would lope at idle.

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