Help! 400 popping and cracking whenever i let off throttle

[Gibson]

My 400 runs fine, but everytime i let off the throttle it pops and cracks really loud, could i be running a little lean?

[NickG5755]

is it popping out of the exhaust?

if so this is unburnt fuel coming out and the results of a RICH condition...

if its from the airbox its lean and its beging for fuel..

[the Z Man]

And sometimes on decelleration it can be an exhaust leak.. check the donuts and flange bolts.:D

[ridinga400ex]

cracking,popping,snapping, jetted wrong?

[m36indiana]

mine did the same thing i replaced the exhaust gaskets, fixed it good