Black smoke means the engine consumes too much gas - possible problem with fuel injection.
An Rx7 is a model of a car that Mazda makes. All cars can smoke lightly through the exhaust system. If the smoke that is coming out becomes excessive or black consult a mechanic.
Already been done. Diesel Particulate Filters and Diesel Exhaust Fluid.
possible blown head gasket. I don't get white smoke from my exhaust! is it from yours? If it is just after you start your car it is normal.
The presence of black smoke from exhaust when engine is first fired.That sign could also be an engine running too rich.
Burning of oil in cars can contribute to blue smoke from exhaust. However, it is also possible for a car to make blue smoke if a turbocharger is broken or experiencing an oil leak.
carbon dioxide as far as I know.
running rich (too much fuel)
The answer is smoke. Smoke is often caused by cars this is by hbw9999
this will happen on all diesel engines (if its going to make reasonable power) its basically soot/carbon from the exhaust and unburnt diesel. on some high power turbo diesel cars there is proper plumes of black smoke. you only need be worried if there is blue smoke while on boost as this means the turbo is shot. but black = good
Disadvantages are, because of cars giving off exhaust smoke. Advantages are, cellphones in case of emergencies.
You're probably talking about the smokestacks, the funnels. Kinda like the exhaust pipes on cars. That generation of steam engines produced lots of smoke.
Cars that don't have smoke in them do not let out smoke.