There are a variety of signs of bad spark plugs including difficulty with starting an engine, a rough idle and an increased consumption of gas. Other signs include an engine that has a sudden surge when driving and difficulty with acceleration when applying the gas.
Spark plugs work by igniting the gasoline in a car's engine to keep it moving. In order to avoid issues, spark plugs should be cleaned and checked regularly. If the plugs get bad enough, the car will fail to run and start at all. Fortunately, spark plugs can go for approximately 30,000 miles before they need to be replaced.Learn More
Oil on spark plugs, also called oil fouling, is commonly caused by failing valve stem guides and bad stem seals. As pressure builds up in the crankcase, excessive oil enters the combustion chamber through worn-out piston rings or cylinder walls and forces its way to spark plugs. Oil fouling can also be caused by transmission fluid sucked through malfunctioning vacuum modulators or leaking lubricants from engine turbochargers.Full Answer >
Spark plugs are replaced every 80,000 miles. Many vehicle manufactures claim their spark plugs can last up to 100,000 miles, but as the gap in the plugs widen, the chance of vehicle problems rises significantly. Some of these problems include bad gas mileage and reduced engine performance.Full Answer >
A four-cylinder engine has four spark plugs. An important part of the power-generating process, each spark plug is responsible for igniting the fuel and air mixture inside of its cylinder.Full Answer >
There are many symptoms of a bad starter, but one of the most notable symptoms is the vehicle failing to start when the key turns to the appropriate starting position. Because a faulty starter mimics other potential problems that may cause the car to not start, such as a bad battery, it is helpful to narrow down the possibilities by ensuring that the battery is not dead or that the car has enough fuel.Full Answer >