I replaced the coil and ignitor in the distributor and did cap,rotor,plugs and wires while I was at it. Now it’s running fine while driving just mostly while warming up it hiccups. The tac doesn’t seem to move while it does it and when it warms up it does it slightly and not very often. I didn’t time it just put the distributor right back in the center where it was could that be an issue? Thanks for an advice