My '86 has a slight cold start stumble. Sometimes it will hold idle other times it won't and stall. If I give it gas at start up idle is solid, but if I don't it will idle low and the battery light is on. Then once I blip the gas all is well. Warm idle extremely solid. I'm thinking it could be the AAV or a loose hose, but I have retightened all hose fittings. Could it be my alternator belt sticking or too tight? It probably needs replacement anyways. Any advice would be much appreciated.