I am having trouble figuring out why the drivers side plug closest to the fire wall (71 chevy 350) isn't firing and causing a miss..I have replaced the plug twice to make sure I didn't get a new dud plug, the wires,checked the rotor and the metal points inside and outside, at the top of the distributor cap,both have clean metal...I haven't pulled the rotor yet to see if it's points ign underneath, I could see a condenser/capacitor but what's stumping me is just this one not firing..wouldn't seem like a points or rotor malfunction or small crack in the dist cap?...I notice a bit of smoke coming from that side of the dual exhaust and figured it may be due to the non firing plug and or a valve guide seal problem since this truck had sit quite a while in the prev owner's yard...could it be a valve malfunction maybe? but this motor starts really easy and idles fine and sounds tight for having that one plug prob.. btw I replaced the vacuum adv line and made sure there was good vac on it and no leakage... like to get this old dually running smooth...
thanks in advance for any ides or suggestions
Mike
