I have an 04 cummins 5.9 and I'm wondering what would be the best things I can do to get the best outa my truck as in cleaning sensors and what not to get better mpg and performance. I will eventually post what is done to the truck eventually but as of now the motor is beefed up a little bit and it has no chip but will haul tail ! The guy I bought the truck from took it to a shop and had motor work done but I'm looking for other mods I can do to make it better not only on mpg but on performance !!!

 

Get a smarty! And some gauges

 

Tune, Full exhaust and intake. and of course gauges.

 

better fuel filtration if it doesnt already have it. like said before, get a smarty.

you really need to list what is done to the truck so people aint telling you stuff that might already be done.