I recently went muddin for about 4 days straight. After I got back on the highway my jeep was gutless, and kinda sputtered at high RPM roughly 3000 to 4000. Instantly I figured it was somthing to do with my air intake since my filter was pretty bad. After dropping a K&N in it got even worse which I'm sure was a coincidence. But now I'm at a loss and don't know what else to check. I was hopin some jeep guru might know where I should start?