Hey there! We are the lucky owners of a 1995 Punto, called Helga. When we bought it she had a problem firing on 3 cylinders when cold. A new set of spark plugs fixed it. Today it did it again!? So is it a plug again or could it be something else, maybe the humid weather in Denmark?? And it also never gets up to 1/2 temp? It's always at a little past 1/4? Stuck open thermostat?? Would be awesome if someone could help me get it fixed!!