Q:

What is the cause of ignition coil failures?

A:

Quick Answer

Ignition coil failures are caused by worn out spark plugs that fail to transmit electronic signals in a functional and fluid manner. This creates a disruption in the regular flow of power across the ignition coil and makes the engine lose power. It is less common but still possible that the rotor the ignition coil rests on breaks and reduces the function of the power circuit.

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Full Answer

The ignition coil is the primary tool used between the battery and the rest of the engine in terms of transmitting electrical power from one point in the machinery to the entire combustion process. This device sits on a high-powered rotor that allows for fluid movement as the coil transfers electricity along the cylindrical path of its metallic frame. When spark plugs fail to transmit electrical information in the right sequence and frequency, this causes significant issues that result in ignition coil failure.

An ignition coil failure is easy to detect thanks to the visible ways it impacts the engine. Cars and trucks with ignition coil failure experience backfiring, misfiring and problems with getting the vehicle to start in the first place. When drivers encounter issues with maintaining power in the automobile, it is likely that the issue is an ignition coil failure.

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Related Questions

  • Q:

    How is an ignition coil tested?

    A:

    Although there are a number of suggested tests for the ignition coil while it is still attached to a car, the only accurate way of testing a coil is on a bench using a multimeter in the resistance setting. The ignition coil has two coils of wires, called windings. The meter quickly displays if either winding is bad.

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  • Q:

    How can you test an electronic ignition coil?

    A:

    Several tests can be done to test an electronic ignition coil, including a standard coil test, primary circuit switching test and ignition coil resistance. These tests will test the resistance felt on the ignition coil when it is connected to an outside power source.

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  • Q:

    What causes oil to be on my spark plugs?

    A:

    Oil on spark plugs, also called oil fouling, is commonly caused by failing valve stem guides and bad stem seals. As pressure builds up in the crankcase, excessive oil enters the combustion chamber through worn-out piston rings or cylinder walls and forces its way to spark plugs. Oil fouling can also be caused by transmission fluid sucked through malfunctioning vacuum modulators or leaking lubricants from engine turbochargers.

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  • Q:

    What is the way to test a 12-volt ignition coil?

    A:

    In order to test the spark, pull the spark plug from the engine, and then start the car. There should be a bright blue spark between the electrodes every time the cylinder fires, provided that there is enough voltage reaching the spark plug. The coil is likely to be faulty if there is no spark.

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