ok, that smells just like leaky injectors and/or fuel dist. it STILL could be a weak coil also, as a weak coil takes longer to fire a cold motor and fuel goes unburned. you didn't mention odometer mileage, but after 150k or so, all 3 would not surprise me. along wih the cap, rotor, plugs and wires. gotta look at everything. and don't cheap out on the parts-go bosch with the cap and rotor, bosch or ngk coppers for plugs, no platinums allowed, and beru or karlyn for wires, no bosch allowed. good luck, chuck.