What causes carbon to foul the spark plugs?
If a fuel injector is clogged or sticking open, extra fuel can cause carbon problems. If the mass air flow sensor or oxygen sensors are not accurately reporting the air coming into the engine or the oxygen content in the exhaust stream, it could cause a rich-running condition that can cause carbon to foul the spark plugs.
Why are my spark plugs black and grey?
If the spark plugs have a matte black or grey appearance, it could be carbon fouling — something typically caused by a fuel mixture that is too rich. During normal combustion, most of the fuel oxidizes and changes into carbon dioxide and carbon monoxide gas.
What causes spark plugs to get wet and foul out?
According to AA1Car.com, this occurs when the spark plug fails to fire, or fouls out. This can be caused by a number of variables, such as engine flooding, or excessive moisture build up. Failed vehicle starting attempts eventually lead to wet spark plugs, according to E3 Spark Plugs.
Why are the spark plugs on my car not working?
This can lead to engine flooding, which in turn can soak the plugs so they’re unable to form any kind of spark to start the engine. This often happens in cold weather conditions, when spark plugs that are previously worn or fouled require a higher voltage to ignite the engine.
Are there engine problems in a 2002 Jeep Liberty?
Seems to be a common issue in this year 3.7L engine. This happened while driving in traffic on a city street and I can’t imagine what I would have done if I had been driving on I95 when it occured. The contact owns a 2002 Jeep Liberty. The contact heard an abnormal noise associated with the 3.7 liter engine.
What does it mean when a spark plug is fouled?
Carbon fouling is one of the potential fouling problems that happens to spark plugs. According to NGK Spark Plugs, when the insulator nose of the spark plug is coated, it is considered fouled. The website continues to explain that while carbon fouling can cause problems, if the spark plugs are cleaned,…
Why does my Jeep Liberty keep going out?
The warranty company for the motor acts as if they did not know the motors constantly go out. The contact owns a 2002 Jeep Liberty. While driving 35 mph, the air bag and check engine warning indicators illuminated. In addition, the air bag indicator illuminated intermittently.
This can lead to engine flooding, which in turn can soak the plugs so they’re unable to form any kind of spark to start the engine. This often happens in cold weather conditions, when spark plugs that are previously worn or fouled require a higher voltage to ignite the engine.