I have a '99 1500 SE that was in need of a carb rebuild. I removed, cleaned and rebuilt the carbs and reinstalled. After startup, there is a "popping" that sounds like its coming from the collector chamber. The engine runs fine, smooth with no hiccup when the pop happens. Tach doesn't flicker at the pop either. This seemed to have appeared after I installed the rebuilt carbs, as it wasn't noticed before. I've had a few wings, but this is a first for me. Any input is appreciated.