My '03 Ultra starts fine but the engine light comes on and it seems like one cylnder drops off intermittently. All the obvious has been checked. Any suggestions... Thanks....

 

I just had my 99 Ultra do a shut down after 20 min run. ended up being Crank Position sensor. If you are only loosing one cylinder you might check and see if you are still getting spark once that starts. Plug wire, plug, ignition coil, or it could be fuel/injector related.

 

Dont forget basics, it is amazing the symptoms a bad ground can create