High fuel consumption, Strong petrol smell in exhaust, low on power, black spark plugs which should be a hazel colour. Any or all of these is a giveaway.
Black smoke is an indication of an overly rich fuel/air mixture.
Black smoke is a indication that the air/fuel mixture is overly rich. Seek professional help to solve the problem.
A rich condition.
Black smoke is a indication of an overly rich Fuel/Air mixture. Blue smoke is oil burning.
Yes
install a cold air intake. more air with same amount of fuel being injected will lean out the fuel/air mixture. plus you'll get more power
Black smoke is an indication of an overly rich fuel/air mixture. This will destroy your catalytic converter and O2 sensor so have it repaired ASAP.
Black smoke is an indication that the fuel/air mixture is far too rich. The black smoke is excess fuel being burnt.
Black smoke is an indication of an overly rich fuel/air mixture. Blue smoke indicates oil burning. White smoke indicates coolant entering the combustion chamber.
You are running too rich. the mixture of fuel and air has too much fuel in it,
Adjust the fuel/air mixture, ensure you have an unclogged air filter/air cleaner.
Well the preferred ratio is 14.7:1 (14.7(air):1(fuel)) so anything below this is rich.... 14.6:1 for e.g