WHEN HIT GAS PEDAL BLACK SMOKE COMES OUT OF MY TAIL PIPE
look at spark plugs and make sure they are good and not worn (improper burning of fuel) also note which plug came from what cylinder, If all plugs are same color then you have a rich burn of fuel and not enough air mixture, if a few plugs are dark and the rest look clean and light brown then do a dry compression check on cylinders, if any cylinder is low on compression then proceed to do a wet compression check on cylinders, if they increase on compression then you have bad or worn piston rings which would burn oil causing smoke as well.
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