So, your gauges are having issues? Or your ECM is having issues?
Yeah, I also think if they are having issues just plugging up to the computer, you may have a large problem there. For giggles, have you tried plugging in an OBD-II reader just to see if it picks up anything?
If it doesn't, your OBD-II port could be the start to fix your issue, which if I can remember is part of the ECM assembly.
Ford could fix it, but wow that would be super expensive and the ECM fix is not a DIY project at all.
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R.I.P - FELLOW FF MEMBER, IZZY, BLK2k3GTS, will always be remembered. We will compete on a different course again one day.