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If her 4.6L Ford vehicle (or pick up or SUV) equipped v the 2 coil pack Ignition mechanism is misfiring (P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308), this is the short article that will aid you come troubleshoot those misfire codes.

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The two most usual problems, through this kind of ignition system is either a poor ignition coil or bad spark plug wires, and this short article will help you to troubleshoot both.

CIRCUIT DIAGRAM: The following circuit diagram might be of help: Ignition mechanism Wiring chart (1997-1999 4.6L Ford F150, F250).

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friend can uncover this indict in Spanish here: Cómo Probar ras Bobinas De Encendido DIS (4.6L Ford V8) (at: autotecnico-online.com).

Important Tips and also Suggestions

IMPORTANT: before you jump right into the tests, please read the complying with tips and also suggestions:

TIP 1: I"ll usage the expression ‘Paired Cylinders’ quite a bit. To properly diagnose the misfire or ignition system on her 4.6L Ford vehicle, it"s vital that you know what this means, so it is in sure and also read the ar ‘Coil pack Basics’ prior to you begin testing.

TIP 2: Think and breathe safety the whole time you"re physically doing these tests, because some of these tests call for that you crank the engine.

If a helper is gonna" assist you, have actually him or her wait exterior the vehicle till you"re prepared to have him or her crank the engine (as you"re setup up the test).

TIP 3: You"ll notice that the photos and the testing instructions speak to for an HEI spark tester. If you don"t have one, don"t panic, you can use any kind of other form of spark tester (although the results may not be together accurate). If you want to recognize the reason for the permanent on the HEI spark tester, walk to: The HEI Spark Tester (The finest Spark Tester top top The Market) (at: easyautodiagnostics.com).

Coil pack Basics

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What"s gonna assist you come easily discover the negative coil fill or the root cause of the misfire on your 4.6L Ford automobile or pick up (or SUV), is to recognize that every coil fill is comprised of 2 individual ignition coils.

Here are some more specific details:

Each individual ignition coil (within the pack) has two towers.This is the reason why every coil pack has actually a full of 4 towers.Two towers fire spark come 2 various cylinders at the specific same time.The cylinders that gain spark at the specific same time are recognized as ‘Paired Cylinders’.Each coil pack has actually three wires coming the end of its electrical connector.One cable is the power source (12 Volts).The various other 2 wires administer the convert signal because that each ignition coil.The switching signal is what activates the separation, personal, instance ignition coil (within the pack) come fire turn off spark.The coil load on the passenger next of the engine feeds spark to:Cylinders 1 and 6.Cylinders 3 and 5.The coil fill on the driver side of the engine feeds spark to:Cylinders 4 and also 7.Cylinders 2 and 8.The most important thing come remember is the the two cylinders that obtain spark at the specific same time are referred to as ‘Paired Cylinders’ transparent the article.

Keeping the over info in mind, as you test the ignition system, will assist you to easily diagnose the root cause of the misfire. Now, don"t let every one of this info intimidate you, the short article should walk you thru" the whole testing procedure without too lot difficulty.

Where come Buy The Ignition Coil Pack and also Save

The following links will assist you comparison shop for the original Motorcraft and aftermarket ignition coil packs:


Not certain if the above ignition coil package fit your certain Ford? Don"t worry, when you acquire to the site, they"ll make certain it fits. If it doesn"t, they"ll discover you the right one.

Circuit descriptions Of The Coil Packs

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Each coil pack"s electrical connector has actually three wires coming out it. In the illustration over you"ll an alert that the coil packs connector has actually 3 masculine spade terminals. Every terminal is labeled v a number (1, 2, or 3).

Here are the job descriptions that the wires that attach to these coil load male spade terminals:


Passenger side Coil Pack:

Wire labeled v the number 1 feeds the switching signal for cylinders 1 and also 6.Wire labeled with the number 2 feeds 12 Volts to the coil pack.Wire labeled through the number 3 feeds the switching signal for cylinders 3 and 5.

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Driver side Coil Pack:

Wire labeled with the number 1 feeds the switching signal because that cylinders 4 and also 7.Wire labeled v the number 2 feeds 12 Volts come the coil pack.Wire labeled with the number 3 feeds the convert signal because that cylinders 2 and also 8.