The weather here in NZ is very cold at the moment. Typically 1-3 degrees overnight. In the morning, my car is just undriveable until it has warmed up. When I first bought it ( at 50,000 km) it wasn't too bad when cold. But now (120,000 km), it won't do anything more than idle until the temperature gauge has risen to about 1/8 past cold, even though the heater can be pumping out warm air. This can make it interesting when pulling out into traffic on a barely warmed up engine. It's like " C'mon Gertie, you can do it', as the car idles across the line of oncoming traffic, and then all of a sudden, after the danger has passed, the engine leaps into life, as the computer senses that some tempersture threshold has been passed. But it seems as though its been gradually getting worse. Could this be a thermostat issue?