this may be a little late but i reseved a full Edge package chip throtlebody and cold air intake . Also the edge insite. i have been using the insite and checking
0 to60 1/4 mile load intake air temp. water temp. and more . My xj is stock and now I'm starting to change and add things.also been watching my mpg for 2yr.
1 thing i have found is the cherokee likes slower speed 45 to 55 for the best mpg after 55 it goes down. also anything that make more hp and tork. the less you have to push on the rightfoot. i will try to keep you all up on what i find out.