Yeah it was the 4.7L in 08 and the 5.7L in 09. Tuning changes year and year however, normally for driveability updates; sometimes there are TSB's that address certain changes that are recommended. The factory 05 tune, if never updated due to service or a TSB, is likely different than 07 factory tunes. That would explain why you feel a notable difference and we don't notice much in our 07s.
I had a thought this morning while driving in to work... I wonder if any of the tunes maintain the MDS functionality.
Anyone...?
Matt...??? ;o)
2007 Commander Overland / 4" SuperLift / 285/70R17 Cooper Discoverer ST Maxx / Rusty's adjustable rear UCAs / Carolina Driveline front drive shaft / Flashpaq / DRLs & Tilting Mirrors / Autolite Iridiums / Cobra 29LX Chrome LE CB & Firestik antenna / Rear fog lights / Mopar Grille Guard with HID driving lights
"4 wheel drive does not mean 4 wheel stop!" -Lee Goldberg, WABC TV weatherman
All of them do. There's a seperate option to disable MDS when tuning.
I run with mine off (MDS) I know it hurts my MPG, feel I get full power all the time.
PJMJR508
(Happy Jeep)
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