WELL, maybe its not all good. after a 5 min. drive it seemed normal, then later today i went into town and after a couple minutes it was doing the same thing. checked timing--good. tomorrow im gonna check the float bowl to make sure its not full of dirt or water. i think i will still get a new vac advance. what about the coil??? once again this only happens when im ON the gas in 3rd or 4th gear (read: 2nd or 3rd--1st is the granny)