EEC explain the causes and concerns of white smoke

Unburnt fuel in exhaust stream signals potential engine problems.

EEC explain the causes and concerns of white smoke

White smoke from a vehicle’s exhaust indicates that raw, unburnt fuel is entering the exhaust stream, usually due to incomplete combustion within the engine. Several factors can contribute to this issue.

Common causes include incorrect fuel injection timing, which disrupts the engine’s cycle and prevents proper combustion. Defective fuel injectors, which may spray fuel improperly or excessively, can also lead to unburnt fuel. Low cylinder compression, preventing the fuel-air mixture from igniting correctly, is another potential cause.

Low cylinder compression can be caused by leaking valves, sticking or worn piston rings, excessive cylinder wear, or cylinder glazing.

If white smoke appears only during a cold start and disappears as the engine warms up, it is often due to fouling deposits around the piston rings or cylinder glazing. This usually resolves as the engine reaches operating temperature.

However, continuous white smoke is a more serious issue, generally indicating a mechanical fault or persistent incorrect fuel injection timing. Ignoring this problem can lead to further engine damage and reduced performance, making prompt diagnosis and repair essential.

To find out more about the full EEC range, please click here.

Have your say!

0 0

Lost Password

Please enter your username or email address. You will receive a link to create a new password via email.