What have you done today to your Cherokee?
I did this in another forum an it was loads of fun to see some daily posts.
Today I installed my aFe Pro 5R air filter, the install also gave me a reason to buy a nifty telescoping magnet, first Jeep I've owned that had screws instead of clips for the air box. I had a K&N on my Liberty that made a huge difference with mileage and acceleration. Hopefully this will give me similar results.