check your dist cap again and see if any of the electrodes in the cap have broken or burnt. if you have spark to all other cylinders but not the one it has to a ignition problem, have you pulled the plug on the bad cylinder and held to ground (not with your hand) nad cranked the motor over? does that plug get spark? if it is firring then you may have a fuel injection problem. to much fuel or fuel being injected at the wrong time after the spark has occured.

first check for spark at that cylnder.

Dan