The top reason ignition coils fail is bad spark plugs or plug wires. Another potential cause is heat and vibration, which can damage the ignition coil's windings and insulation. If an engine is experiencing repeated coil failures, the underlying cause may be resistance from worn spark plugs or excessive spark plug gap. In rare cases, the failure may be due to a lean fuel condition caused by leaky valves.Continue Reading
An automobile's ignition coil provides the high voltage needed by the ignition system to fire the spark plugs. It increases the ignition system's primary voltage from 12 volts up to thousands of volts. If a spark plug or plug wire is open or has excessive resistance, the ignition coil's output voltage can shoot higher and burns through the coil's internal insulation, causing a short. This is most likely to occur when output exceeds 35,000 volts.
When a coil failure occurs, the coil's voltage output drops, and the engine may not start or may misfire badly when under load. The misfire may also jump from cylinder to cylinder. A car owner suspecting damage to the ignition coil should measure the coil's primary and secondary resistance with an ohmmeter. If either is out of specifications, the coil needs to be replaced.Learn more about Car Parts & Maintenance
There are several reasons a warm car may stall, including vapor lock, an overheating fuel pump and ignition coils that are cutting out. Overheating ignition coils may also cause a car to stall when warm.Full Answer >
Kanter Auto Products sells fuel and water pumps, gas tanks, tires and tubes, idler arms, and ignition coils. They also sell engine parts, engine overhaul kits, fender covers and repair kits for floors, trunks and fuel tanks. The company sells lights, mirrors, clutches, convertible tops and convertible rear glass windows.Full Answer >
An ignition coil is a coil in a car's ignition system that carries the 6 or 12 volts from the battery to the many volts used to spark the spark plugs in the ignition. An ignition coil is also called a spark coil, and is classified as an induction coil. All induction coils are electronic transformers that transform low-voltage pulses from the DC supply into higher voltage currents needed to spark machine engines.Full Answer >
A car igniter is a component in the car's engine that is responsible for sending a signal from within the distributor to the ignition coil, making the spark plugs fire. It is also known as the ignition control module.Full Answer >