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Thanks for that. And thanks for reading Autoblog. Engine misfires, rough idle, and loss of power One of the most common symptoms associated with a faulty ignition coil is engine performance issues. Car is not starting A faulty ignition coil can also lead to a no-start condition. Ownership check engine light ignition system. View More. Thank You Thanks for subscribing.
Check your in-box to get started. Sign Up More Info. We notice you're using an ad blocker. Please consider allowing Autoblog. Allow Us! Here's how to disable adblocking on our site. The easiest way to understand why an engine light is on is with an OBD-II on-board diagnostics check. Codes P to P indicate misfires, while codes P to P are for ignition coil issues.
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:. There is one ignition coil per cylinder, with each coil connected to the spark plug. In this case, the coils would be attached to the plug by short plug wires. Testing an ignition coil can be dangerous if done incorrectly. This blog is for informational purposes only.
If you do not know how to safely test an ignition coil, you should get help from a qualified specialist. Codes P to P indicate engine misfires, while codes P to P are for ignition coil issues. The easiest part is checking the ignition coil wiring. If any of the wires are damaged or deteriorated, this could be the source of your ignition coil problems. You should also take a look at the coil harness and connector for faults, especially bent terminal pins and loose connections.
Liquids can damage ignition coils, so pay close attention for signs of moisture. You should always use insulated tools and wear thick rubber gloves for this kind of test.
Additionally, a higher voltage can also be induced into the coil if the number of windings in the coil is increased. If two coils of wire are placed next to or around each other and an electric current is used to create a magnetic field around one coil which we call the primary winding , the magnetic field will also surround the second coil or secondary winding.
When the electric current is switched off and the magnetic field then collapses, it will induce a voltage into both the primary and the secondary windings. Figure 5: The magnetic field in the primary winding also surrounds the secondary winding. Collapsing the field induces electric currents in both windings. For ignition coils and many types of electrical transformer , the secondary winding is made with more windings than the primary winding.
When the magnetic field collapses, it will therefore induce a higher voltage into the secondary winding than into the primary winding Figure 6.
Figure 6: Here, the secondary winding has more coils than the primary winding. When the magnetic field collapses, the voltage in the secondary coil will be greater than the voltage induced in the primary winding.
The primary winding of an ignition coil will typically contain to turns of wire; the secondary winding will typically contain 15, to 30, turns of wire, or around times more than the primary winding. When a spark is required at a spark plug, the ignition system will switch off the current flow to the primary winding, which will cause the magnetic field to collapse.
The collapsing magnetic field will induce a voltage into the primary winding in the region of volts; but the voltage induced into the secondary winding will be approximately times greater, around 20, volts. By using the effects of mutual inductance and by using a secondary winding that has times more windings than the primary winding, it is therefore possible to transform the original volt supply into a very high voltage.
In an ignition coil, the primary and secondary windings are wrapped around an iron core, which helps concentrate and enhance the strength of the magnetic field and flux, thus making the ignition coil more efficient.
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