Yes I UPGRADED from an MX5, the Zed is much better to drive all round. Feels safer in it too, not that I drive any slower though. lol. You wont look back
I take it that when you parked it up a few months ago it was all good. What I would do to start off with, is disconnect the battery for a while. Put some fresh fuel in it. Then run it for a while and see what happens. You never know might just clear it up. Good luck.