Stuck in Commiefornia...
Join Date: Dec 2008
Location: Clearfield, Utah
Thanked 447 Times in 315 Posts
The better tuners should be able to give you a little improvement, but remember, these guys primarily tune for power, not drivability.
Ask for the following:
Glow plug light on time, have it increased by 20-50%
Glow plug on time at altitude, increase by 20-50% at temps under 40 deg F
Increase the commanded boost at low rpm slightly in the altitude tables
Decrease the timing by .5-1 degree in the altitude tables to generate more heat
All of this can be done to aid in cold drivability. Perhaps more. But again, aftermarket tuners are power guys not drivability guys. I've done a lot of drivability work and it's the hardest part of tuning because different people have different driving styles. Drivability for different parts of the country is also different, and it can get very frustrating for the tuner. Fortunately with little more than an air intake and exhaust to adjust for on these trucks, it's possible to leave the idle and cruise portions of the tune relatively stock on a 6.0 and not have too many issues.
The Current Truck (Oct-2013 to Present):
1999 (Early) F-350 Lariat, CCLB, SRW, Black/Tan
7.3L Powerstroke, 4R100, 4x4, 3.73, 37x13.50-18s, '05 Axle Swap, 6" Fabtech lift, GTP38 "D66" turbo upgrade, SCT 4-position chip with custom tuning by me, Straight Piped 4" down pipe through 5" dual stacks, N-Fab full length triple steps, Pro-Tech cab guard and tool box, louvered 5th wheel gate, Hella 500 Fog and Driving lamps, much more to come...
The one I'll miss, (Mar-2009 to Jan-2014):
2000 Excursion XLT 4x4
6.8L V-10, 4R100, 4.30, 285/75-18, 271whp / 388wtq
The one I won't, (Jul-2005 to Sep-2012):
2005 F-350 XLT, CCLB, SRW, 4x4 FX4
6.0L PSD, ZF-6S650, 3.73, 35x12.5-18, 4.5" Lift