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Petrol engines rely on ignition systems to start efficiently, maintain smooth operation, and reduce emissions. From spark plugs and ignition coils to sensors and switches, these components work together to ignite the air-fuel mixture in the combustion chamber. At Wilmink Engine Parts, we provide a wide selection of ignition parts suitable for modern gasoline and diesel engines, including trusted brands like Denso. |
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The ignition system in a car is responsible for combustion in the engine’s cylinders. It does this by generating a high-voltage spark through the spark plug at the right time to ignite the air-fuel mixture. This spark starts the engine and keeps it running. In gasoline engines, this system involves components such as the ignition coil, spark plugs, distributor (in older models), and ignition wires.
The number of ignition coils depends on the design of the engine. Older vehicles have a single ignition coil with a distributor. This system was succeeded by electronic ignition, often with two ignition coils and spark plug wires to the different cylinders. Most modern engines now use a pen ignition coil. In a pen coil, the spark plug cap and the coil are integrated as a whole, eliminating the need for spark plug wires. In this system, each cylinder has its own coil.
A coil increases the 12 volts from the battery to as much as 20,000-40,000 volts or more. This high voltage is needed to create a spark between the central electrode and the ground electrode of the spark plug. This allows the fuel-air mixture in the combustion chamber to ignite.
The ignition system generates and delivers a timed high-voltage spark to each spark plug. This is controlled by the ECU (Engine Control Unit), which uses signals from the crankshaft and camshaft sensors to determine the ignition timing. The main components are the ignition coil, spark plugs, crankshaft position sensor, ignition switch, and associated wiring.
You can test an ignition coil using a digital multimeter. First, disconnect the coil. Then measure the resistance across the primary and secondary terminals. Compare the results with specifications from the vehicle’s service manual. Misfiring, rough idle, and trouble codes are common signs of coil failure.
Our ignition selection includes ignition coils, spark plugs, crankshaft and camshaft sensors. But we can also supply distributor caps and spark plug cables for older systems, usually to order. We supply ignition products from brands such as Denso.
