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Discussion Starter · #1 ·
Hey folks,

I've got an 2000 E350 Superduty, have an issue with the IDM as far as we can tell. My original is an IDM 120 - XC3F 12B599AC. I have a couple questions, hopefully someone can help.

What is the difference between the following 3 IDM's?

XC3F 12B599AC
XC3F 12B599AD
XC3Z 12B599AC

Second question is:
The issue I'm having is that when the truck gets up over 80km/h (55 mph) it starts to chug and misfire. Drop it back down below that speed it seems ok. Has anyone had this issue? Any ideas if we're looking in the right area here with the IDM?

Any help is appreciated, thanks.

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