Had one today on an "M" plate had been giving a local garage lots of problems, they had tried a lot of things with no luck. I lightly pushed the top 10 amp fuse in the front fusebox marked "inj" and note of the engine changed, took fuse out which was quite corroded, cleaned the blades in the fusebox and retried it but would not start but put a new fuse in and all was ok, seen this a few times on Micras, Jim.