Whats black smoke on accelerating mean?

[Bill]

I was driving through the mountains on Sunday following a Black R32GTR.

Everytime it accelerated it was blowing black smoke.

Just curious as to whats that usually mean?

[benjiman74]

Black smoke is usually an indication that an engine is running rich.

[Bl4cK32]

black smoke = petrol

blue smoke = oil burning

white smoke = coolant or blown ring land

none is good.

[myr332]

black smoke = petrol

blue smoke = oil burning

white smoke = coolant or blown ring land

none is good.

There is no problems with running rich.

If you're exhaust fumes are black it just means that your fuel economy will be a bit nasty however it is the safe way of operating so that you are never running lean therefore running close to detonation.

Usually an indication that your 'line could use a tune to modify the fuel mixtures so that you're not getting 200km to a tank of gas.

[Bl4cK32]

Ummm excessive fuel can lead to glazed bores and a fu*ed motor. Feel free to add any other useful comments he may want to listen to....makes me laugh