What would cause black smoke and loss of power when you press the gas?

Answer

It could be the timing is off on the vehicle or bad spark plugs or the engine is almost blown from not changing the oil If the fuel to air ratio is very rich on a petrol car or the choke stuck on the extra fuel will cause black exhaust but will also smell very petroly. Austin Mini used to be bad as choke lever could swing right over even after pushing choke in.

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