Diablosport Forums

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

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

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

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

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

yes i have overhead shows 14.8 and im calculating 14.5