Also, how do I check them and how do I clean them up? I am running rich.
Second question: Is the engine coolant bottle on the left at the front supposed to spew coolant all over the floor when you top it up (from somewhere about halfway down the bottle), or does mine have a crack or hole, i.e. is it supposed to be sealed? There doesn't seem to be any cooling problem and no coolant seems to be lost. PS - one other thing, the dipstick in the coolant bottle has suddenly started developing a black smudge at the bottom. I thought about possible blown gasket but that doesn't seem to be the case and there is no engine warning light.
Thanks.