05 columbia electrical problems

[ISF]

Hi Billajack,
Sounds like a connector, harness or sensor problem. Take to a shop and have them do a Snapshot while your driving and when the problem is occurring you flag it.
Play back the data and analyze it and you'll see what is causing it. If your near DIESEL SPEC (www.dieselspec.ca ) have them do it, they are after all experts in fixing these kind of problems.
They are experts in fixing any EGR and Low Power problems.
Regards ISF

[truckersrstupid]

I doubt the problem is an oil pressure sensor issue, if it were, you wouldn't have any temperature gauge issues (DDEC V temp and pressure sensors use different commons). I would be looking at the VIH (the harness that feeds the ECM w/power, ground, ignition, and driver interface switches). I've seen a lot of similar problems and I've replaced a lot of VIH's. If you take it into another shop, don't mention the power loss. Saying power loss is almost begging a shop to jump on any EGR/turbo relate fault codes, which I'd bet dollars to donuts is not your problem.