I have an 05 dodge cummins auto tranny edge juice with attitude chip k&n replacement filter 4" mbrp exhaust and a fass titanium. My problem is that about 50 percent of the time on start up it idles a little rough then clears out within 30 to 60 seconds. Should I be worried about this? Also it happens even after it's been warmed up and running for a while not just first start up on the day. Thanks any advice would be appreciated