Black Smoke from the Tail Pipe
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Long ago we realized that one of the purposes of our Car Donation Program was to improve the environment by picking up old non-running vehicles, unsafe vehicles or smokers. In this section we provide information and solutions to common car problems. In this way you may be able to get your car fixed and thus accomplish the purpose as well. If the problem isn’t solved or you would like to get another vehicle, you can also consider donating your car or vehicle.
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Alert
At ALL times be on the alert for UNUSUAL sounds, leaks, smells and of course smoke.
Smoke must not be ignored...
While it doesn’t mean there may be a fire, smoke must not be ignored
Black Smoke from the Tailpipe
Black smoke from the tailpipe can be so slight as to only leave a black spot of soot on the driveway; or just when you start the engine. Or in extreme cases a steady stream of black smoke while driving.
Cause of black smoke
The cause of black smoke is when the mixture of air and fuel flowing through carburetor and into the cylinders is what mechanics call "rich".
Rich Mixture
Although "rich" mixture is needed when the starting a car, when the choke remains closed the mixture stays rich and black smoke is the result.
On a car with fuel injection, it isn’t the choke which remains closed as there isn’t one, but malfunction with the computer.
The computer receives signals telling it the engine is warm or cold.
But with sensors malfunctioning, the computer is getting wrong messages. As a consequence the air-fuel mix is rich when in fact is should be lean.
Having your vehicles emissions tested when you have a tune-up is one way to stay ahead of this problem.
