I had my EML light come on, on my 2001 1.4, and i also had a bad misfire, had it code read at the local Nissan specialists and it came up with a lamda problem, car was due a service anyway so changed plugs and airfilter etc etc, also disconnected the battery overnight, next day no problems and it's been that way for nearly a year lol, i've also had the EML light come on, on a micra i owned a few years ago with no running problems, disconnected the battery for a few hours no more EML probs so might be worth a try first if the EML comes on again.
