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If you"ve been wondering exactly how to check the Coil-On-Plug ignition coils on your Ford automobile or van (with a 4.6L or 5.4L V8) to watch if one or numerous are bad and are causing a misfire, this is the post for you.

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As is the custom below at keolistravelservices.com, the tests steps are explained in detail and also the diagnostic/troubleshooting is achieved in several easy steps.

OK, prior to we jump right into the COP coil tests, let me just make you aware where friend can uncover a complete list the 4.6L and also 5.4L ‘How to Test’ posts that are located in this internet Site and also at troubleshootmyvehicle.com and also this list is discovered here: Ford 4.6L, 5.4L table of contents Of Articles.

One critical thing, I have actually written another 4.6L, 5.4L COP coil post that is a little leaner 보다 this one, you can take a look in ~ it here: Ford 4.6L, 5.4L Coil-On-Plug Misfire test (this short article is located at troubleshootmyvehicle.com).

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Puedes encontrar este tutorial en Español aquí: Pruebas: Bobinas de Encendido Individuales (COP) -4.6L, 5.4L Ford (at: autotecnico-online.com).

Common symptom Of A poor Ford Coil-On-Plug Ignition Coils

This is not the many definitive perform on the subject, however does covering the bulk of symptom I"ve viewed on this form of ignition system:

Misfire codes that light increase the examine engine irradiate (CEL) on her instrument cluster.Misfire codes: P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308.Engine misfire that DOES not light up the examine engine light (CEL).Smell of unburned gasoline coming the end of the tailpipe.Rotten egg smell coming out of the tailpipe. This is as result of the unburned gasoline from the misfiring cylinder over loading the catalytic converter.Really bad gas mileage.Lack of power as you accelerate the automobile down the road.

What Tools execute I Need?

A scan device (automotive diagnostic scanner) isn"t necessary to check the COP ignition coils on her Ford car or truck. The test you"re about to learn are every done there is no one. Now, what if girlfriend don"t know which cylinder is the one misfiring? Don"t you need a scan device to discover out? well no, you can discover out i beg your pardon one the is there is no a scan tool. You have the right to perform the cylinder balance test yourself on her Ford automobile or truck, check 5 will aid you through this. You"ll need:

An HEI spark tester.Battery jump begin cables.LED light.A helper.You"ll need someone to assist you crank the engine while you carry out the tests in the engine compartment.A fix manual.For every little thing remove and also replace information you"ll need that is not spanned by this article.

Circuit explanation Of The C-O-P Ignition Coil Connector

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OK, to test the Coil-On-Plug ignition coils on your Ford car or truck, you need to know what each cable (circuit) walk in the connector. Below are the circuit descriptions:


Circuit labeled 2:Power (12 V) Circuit.Circuit labeled 1:Switching Signal Circuit.

You don"t need to know the shade of the wires because that this test because the circuit descriptions (above) are mutual by all of the eight Coil-On-Plug ignition coils on her Ford auto or truck. So, whether you"re trial and error the number 1 cylinder ignition coil or the number 4 cylinder ignition coil (or whichever ignition coil), the over info applies.

To test these circuits, it"s not necessary to unplug the ignition coil"s connector. What ns recommend you perform is come test because that each signal v the connector linked using a wire-piercing probe. This is the easiest and also the most effective means of gaining at the signals. If you need to see what this device looks like, click here: Wire-Piercing Probe.

See more: The Weight Of Gasoline Per Gallon In Pounds Converter, What Is The Weight Of One Gallon Of Gas

Where come Buy The Ignition Coil and Save

The adhering to links will aid you compare shop for the ignition coils:


Not sure if the ignition coils over fit your specific Ford vehicle? Don"t worry, once you gain to the site, they"ll make sure they fit and also if they don"t, they"ll discover you the ideal ones.