Welcome CMMark, nice to have your experience and knowledge on here.
Quick question, what exactly does the "Ugly Fix" do? I put one on my ISX, and it might help mpg slightly. Not sure it makes any less exhaust smoke. It does seem to run potentially a bit cooler, although haven't really tested it in high summer heat yet. My understanding is that it keeps the EGR closed, by tricking the computer for one of the sensors with a constant input for (atmospheric pressure)? Or something like that.
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2005 Kenworth Showhauler 45 ft total length
twin screw, 450 hp ISX, 10 speed Ultrashift
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