dealer reflash the pcm?

[hoztile_killaz]

2009 Dodge Ram 1500 4X4 Hemi 5.7
U7137

put the stock tune back because i need the 22 MPG i was getting before i got the programmer loved the extra HP and torque but now i do to much HWY driving and the 13.4 MPG isnt enough

should i have the trucks pcm reflashed by the dealer just to make sure that all the stock settings are 100%?

ive noticed while idling the RPMs tend to jump around and while driving down the road the tranny seems to shift to hard from 4th into OD

i will keep my programmer but for now i need more MPG until next summer

[brandy16]

Just return it to stock. No need to go to the dealer it would be the same and you would have to pay to get it done

[mikel]

There is nothing inthe tunes that should cause a loss like that, unless you are hot rodding it everywhere you go.

[hoztile_killaz]

not sure what would cause me to loose almost 10 MPG
i dont really hotrod it everywhere sometimes i do when im in town
but now im on the HWY all the time with it so no need to

the reason i ask if i should take it to the dealer to have it reflashed is im only getting 14.8 MPG (with stock tune back in it)
i know one of the techs at the dealership and he does stuff for me on the side for free

[mikel]

have you tried calculating mileage manually, rather than the overhead?

[hoztile_killaz]

yes i have overhead shows 14.8 and im calculating 14.5