Ok so I have a 2007 6.7L with 226k on the odometer tuned with an H&M’s Mini Maxx and a full get EGR delete and my ECM cooked a few weeks ago.

I had it replaced and ever since then my exhaust brake hasn’t worked my pressure sensor works fine and as far as I can tell.

The VGT is working OK it doesn’t feel sluggish.

Anyway I’m at a loss I’ve tried the return to stock and reinstall it at 12.5 volts the whole time twice and that did nothing.

Any help would be great