When My MX5 1.8 MK1 is cold it seems to smoke Rather a lot. also the tickover rex=vs are aroung 1500 whch seems a bit high. all seems normal once upto temp.
Are you sure it’s smoke and not water vapour? The automatic choke will obviously rev it higher. Probably normal.
Have a look at “The Garage-Engine-Smoking Video”.
Thanks Guys does sound a bit like steam but seems to persist a bit to long. Shall have to do a bit more investigation.