THANKS DUALLYDAVE FOR THE ANSWER TO MY QUESTION. MY 06 DODGE IS AN AUTOMACIC. I DONT NOTICE IT WHEN I FIRST START IT UP. DOES URS DO THIS. MY SON AN HIS DODGE BUDDIES SEEM TO THINK THE COLD WEATER MIGHT HAVE SOME IMPACT ON IT ASWELL.

FOR ALL YOU SO CALLED DIESEL FANATICS. I CANT BELIVE NOT ANYONE CAN ANSWER MY QUESTION ABOUT THE KNOCKING NOISE I HAVE WITH MY PROGRAMER IN MY TRUCK WHEN I IDLE DOWN.

predator prt # 182491,revision v.1r16, 2006, dodge pickup. just bought predator an installed it love the performance. but have a knocking noise when it idles down. only does this when u let off the throttle.does not do it all the time though.i notice more when it in park an you iddle it up an let ...