2004 wj grand cherokee 4.0l... sucks on fuel big time... who is the best tuner for these?... everyone else with this size vehicle can easily knock down 20+ mpg but this thing gets 14-15mpg... on the highway. I want to consider my options.. give me ur thoughts. I only run premium fuel the goal is 20mpg+
Programmer with custom tune
Exhaust
Intake
New plugs
Possibly delete factory crap and go with a megasquirt
....stereotypically chrysler products get horrible mileage and I doubt it is due to driveline inefficiencies but rather tuning and metering of the engines....

 

what is your driving style like?

http://www.fueleconomy.gov/feg/noframes/20313.shtml - Cherokee 4wd

http://www.fueleconomy.gov/feg/noframes/20199.shtml - Cherokee 2WD

http://www.fueleconomy.gov/feg/noframes/20375.shtml - RAV4 4wd

 

My wife drives it highway miles only and its getting 14mpg. Sucks horrible... but I know from years of experience that ttf guys a brilliant and if something can be done custom its being done here... jeep guys seem to thing that's ok mileage except for a few. I have searched with little results of guys doing. Turbo'd 4.0l jeeps and all of them say buy a superchips which they suck... I want custom tunes as they are always better.
Brandon

 

It's a chrysler dude, no makie fuel economy. Plugs, wires, filter, O2 sensors

 

I thought that was a ford thing. LOL