mc16..few problems

kick it over and it will tick over for around 3 to 10 seconds..I have occasionaly managed to rev it up to 6000 ish rpm and I think it sounded ok,but it gradually dies out and I think its missing on one cylinder.

kicking over there appears to be a strong spark from both plugs,but contrary to this the bottom cylinder exhaust smells slightly of fuel from the exhaust tip (not sure on this,there may be some fuel hanging around in there from before ).I have changed over the coil with the plug lead for the bottom cyclinder but didnt make a difference,any ideas ?

really appreciate any help