i was curious as to whether anyone used and sorta chip or programmer with there jeeps. i am just looking to gain a little mpg and pull my bowfishing boat a little easier, and without any damage to my jeep any tips or suggestions would be great...i have a 99 cherokee sport with a 4.0 automatic with 135k

 

thats runnig weird....

 

yeah lol just wonderin for this spring when bowfishing starts back up but defenintly nothing till i get it fixed