Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

Tom Gina 06 · 03-01-2007, 04:12 AM

FYI

I took my newer 2003 truck in and had the computers re-updated yesterday. From the records they put a new modual in in 2005. According to the service bulletins they had a number of prgram changes that included the shifting of the tranmission and also fuel changes that give better MPG. I had it done and went from 15.9 overall MPG to 19.5/20.0 as it looks so far. Road driving went from 17.9 MPG to around 22.0 by the trip computer. If anyone with a Cummins and is not getting the good fuel mileage that others seem to get this is a far more reasonable change (90.00) to make than after market changes. My results were better shifting and a much more snappy throttle response.

03-01-2007, 04:12 AM	#1
Tom Gina 06 Montana Fan Join Date: Jul 2006 Location: Denton Posts: 376 M.O.C. #5993	Computer flash on Cummins engine FYI I took my newer 2003 truck in and had the computers re-updated yesterday. From the records they put a new modual in in 2005. According to the service bulletins they had a number of prgram changes that included the shifting of the tranmission and also fuel changes that give better MPG. I had it done and went from 15.9 overall MPG to 19.5/20.0 as it looks so far. Road driving went from 17.9 MPG to around 22.0 by the trip computer. If anyone with a Cummins and is not getting the good fuel mileage that others seem to get this is a far more reasonable change (90.00) to make than after market changes. My results were better shifting and a much more snappy throttle response.