Posted in: Ignition Coil

How ignition coil works

Meaning of Ignition coil
Before we take a closer look at any possible ignition coil problems, it will be useful to learn a little bit more about what an ignition coil is and how it works.
It is an induction coil in an internal combustion engine for converting a low-voltage current into one whose voltage is sufficient to produce the spark. It’s also an induction coil in an automobile’s ignition system that transforms the battery’s voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel.

Some coils have an internal resistor, while others rely on a resistor wire or an external resistor to limit the current flowing into the coil from the car’s 12-volt supply. The wire that goes from the ignition coil to the distributor and the high voltage wires that go from the distributor to each of the spark plugs are called spark plug wires or high tension leads. Originally, every ignition coil system required mechanical contact breaker points and a capacitor (condenser). More recent electronic ignition systems use a power transistor to provide pulses to the ignition coil. A modern passenger automobile may use one ignition coil for each engine cylinder (or pair of cylinders),eliminating fault-prone spark plug cables and a distributor to route the high voltage pulses.

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Types of Ignition Coil
There are many different types of ignition coils that you should be aware of when trying to fix an ignition coil problem. For example, here are three different ignition coil types:
• Coil-On-Plug (COP)
• Coil-Near-Plug (CNP)
• Coil-Per-Cylinder (CPC)
The most common system, with multiple coils, is Coil-On-Plug (COP). There is one ignition coil per cylinder, with each coil connected to the spark plug. If there isn’t enough room for a COP, perhaps because the spark plugs protrude from the cylinder head, then you might have a CNP setup. In this case, the coils would be attached to the plug by short plug wires.

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Disadvantages or Problems of Fake/Bad Ignition Coil

  1. Poor Fuel Economy
  2. Engine Start becomes difficult
  3. Engine Misfiring or Stalling
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