I don't know what would cause that, but the first thing I'd do is remove the programmer and see if that cures it. That's likely the first thing any shop would tell you to do.
On 2nd thought, you can just do a straight up trade for my '01 Cummins. That'll take care of it.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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