I have had the same problem with my 91 Grand Caravan 3.3 V6 for three years. But this year is the worst with temps hovering below freezing all last week. I have replaced computer on firewall, starter, key switch, ignition distributor, plugs, wires, battery, terminals, and have taken apart and cleaned every connection, including all grounds. Once it starts it starts on first try all day long. It is just in the morning it will not start. I cannot hear the fuel pump either, and the valve on the top of the fuel rack only squirts gas under pressure once while pump should be on then dribbles after that. Did you ever find the problem?