[30 Closed Cab PU]

When slowing down if taking your foot completely off the gas a cough/popping sound is heard, means things are on the lean side. Could just need a little more GAV counter clockwise, or could be your carb idle mixture screw needs tweaking. This most likely will not cause damage/issues. Just one of the fine points in running an A. I agree with eagle above, this is the fun/enjoyment of driving an A, being involved and tuned into maximizing the operation of an A.