A symptom whereby an engine continues to run after the ignition has been turned off. When this occurs, the firing of the engine is uneven, often causing a sound much like a diesel engine.

A part of a car’s driveline that takes the power from the engine and splits it between two wheels or two axles. A differential also lets two wheels on the same axle rotate at different speeds. For instance, when you

Part of a car’s ignition system. The distributor receives the spark from the coil and literally distributes it amongst the spark plugs. In addition to the distributor itself, there is a distributor cap and distributor rotor which send power to

The distributor cap contains the terminals that the spark plug wires plug into. When the distributor sends power to a spark plug, it goes to the cap first and then to the spark plug wire and to the spark plug.

The rotor spins around inside the distributor. As it turns, it comes into contact with the terminals for each spark plug on the distributor cap. When this happens, it sends current at that precise moment to the spark plug, which

An acronym for Data Link Connector. Formerly referred to as the ALDL, this is the connector to which diagnostic scan tools are connected. Under OBD II, the DLC is a standardized 16-cavity connector and has a standardized location under the

The process of going from a higher gear (for instance, fourth gear) to a lower gear (for instance, second gear) with a manual or automatic transmission.

Cracked paint occurs when a paint is so damaged, the surface actually develops cracks. These cracks may spread in a spiderweb fashion across the surface of the paint. Cracked paint is unrestorable, and must often be completely removed when a

The crankshaft is an engine part that takes the up and down motion of the pistons and translates it into circular motion that can be directly transferred to the drivetrain.

Crazed paint occurs when paint is so damaged, the surface actually develops hairline cracks. These cracks may spread in a spiderweb fashion across the surface of the paint. Crazed paint is unrestorable, and sometimes has to be completely removed when

Cruising is a driving style whereby the driver maintains a set speed with very little fluctuation.

CV (constant velocity) joints are part of a car’s driveline. They allow a wheel to rotate freely in any direction while still receiving power from the axle.

The process by which the air/fuel mixture burns within an engine to create power.

The area in the cylinder head where air/fuel is ignited to create power.

Comprehensive coverage includes protection against theft and accident damage, regardless of fault.

A special gauge used by technicians to measure how much pressure a cylinder can create.

A test to see how much pressure a cylinder can create.

Also called antifreeze. The fluid mixed with water that is put into your vehicle’s radiator. Antifreeze is traditionally green in color; however, newer long-life antifreezes may be red or orange. Please refer to your vehicle’s owner’s manual for the proper

Many cars have a clear plastic reservoir that allows the owner to see the level of their vehicle’s coolant. Check your owner’s manual to find the coolant reservoir on your vehicle.

The system of components that keeps your engine at the correct operating temperature. The cooling system includes the radiator, radiator cap, coolant reservoir, cooling fan, water pump, thermostat, hoses, heater core, heater valve, and antifreeze.