Well the car runs fine at all other times, it has no spluttering, bogging down or other running issues. It's just that is unplugged, so obviously cold starts are a bit of a pain. It starts okay, but idles very, very low and if it IS cold (heading into winter, so far 7 degrees C was the lowest) it stalls if you aren't careful - just until it's warmed up, in which case it's fine.