PCM Problem

[speckfisher]

Was told my PCM needed to be replaced. Went to Ford to purchase to a new one a take the old one in for core. I asked the counter person if I had to do anything special to new one. He said no just plug it in.
I did that and it would only crank with the theft light on. I called another Ford because the one I bought it from was closed. I was told that I have to have the old one in the vehicle and have all of the data saved and then download the data into the new PCM after it is installed before it will start.
Does anyone know if there is anyway around this If I can't get the old one back.
Now it wont start

 

[sagebel]

We need a little more info on your truck. What year/engine/trans?

 

[speckfisher]

2000 Excursion 4x4 7.3 Power Stroke automatic

 

[sagebel]

The PCM code needs to match. There should be a label on the PCM connector housing. You need to find out what the old one was and make sure the new one is compatible. Let us know what code the replacement is.

 

[speckfisher]

The old# was YC3F-12A650-AVA 2 dealers told me this was the replacement # YU7F-12A650-AA . Hope this helps

 

[JLDickmon]

YES - it needs to be flashed programmed for it to function properly.

what was the metter with the old PCM?