318 vacuum advance

[QUOTE="Mattyb] My issue is I just replaced the distributor with a new one from Autozone, [/QUOTE] what was wrong with the orig dist? can you swap the weights/springs/vac can from the old to the new one & are they different from each other? check that the new can doesn't have a vac leak (rare but could happen), might as well eliminate that potential as the popping is making me think of a lean misfire. Holler with any news.