40 pin ecm on a 70 pin engine

I've got what i've always thought was a 2ws in my day cab pete. its always seemed low on power though it was turned up to a 550/1850 low-nox file.

so i take it to my local cat shop because i need the jakes rebuilt. i get to talking about the low power stuff. so they some how come up with my ecm is a 1lw and the sticker on the motor clearly shows it being a 2ws.

the shop foreman and the mechanic were thinking their could be some timing differences between the two? maybe attributing the the low power?


anybody got any ideas. i'm only marginally smart about these on my better days.


thanks

 

well the ecm is believe is a 70 pin. is it possible for a 40 pin tune (1lw) to be on a 70 pin ecm?

 

no i do not.

 

i've owned it for about 3 years. It doesnt get driven much. I can't remember the engine serial # right off the top of my head. the truck vin is 498520. I'm waiting for cat to call me back now.