Hey, I'm glad that I'm not the only one with this problem. Mine does it just like yours when the engine is cold. When it warms up all of the way it stops and runs great. I went the route of fuel, air, and electrical. Canged Fuel filters, air filter, plugs, cables, even added some H20 remover from the gas, all nothing. No change, still does it. So I'm at the same place as you. Sorry if my reply wasn't much help. Let me know if you hear of any thing. I'll keep you posted as well.
-cmiller
'92 Loyale