Cylinder Misfire Troubleshoot and Coil Replacement 2004 thru 2008 4.6 L &5.4 L Engines

Learn how to quickly troubleshoot your 2004 thru 2008 Ford F-150 4.6L or 5.4L. I experienced a loss of power while interstate driving. I use a Superchips programmer as my scan tool to quickly read the Diagnostic Troubleshooting Codes (DTC) from my Powertrain Control Module. I get a PO307 Cylinder #7 Misfire Detected. I remove the #7 Coil and replace it with a new one. I run the engine and clear the fault code to determine if the code returns. Other common causes for this code include defective spark plug, bad coil, bad fuel injector, low fuel pressure, bad fuel, vacuum leak, bad camshaft or crankshaft sensor, camshaft timing off.
Recommended Tools:
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1/4" Drive Ratchet (as shown in video) amzn.to/2Hfpo11
1/4" Drive x 7 mm Deepwell Socket (Set) amzn.to/2LdbBcT
1/4" Drive Socket Set, amzn.to/2L2Pa9R
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Consumables:
Dielectric Tune-up Grease, Permatex 22058 amzn.to/2WBzHFI
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Rag or Paper Towel
Shop Towels, Disposable amzn.to/2EZV5KM
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[@plant-lover9547]

Do you put the dielectric compound on the pins and springs of the coil along with the boots and top of the pin housing?

[@StilesAutomotive]

Plant-Lover, In some of my Stiles Automotive Videos, I use a lot of Di-electric Grease, probably way, way to generous with it. It is great at lubricating and water-proofing Connectors. It helps Electrical Connectors come apart the next time so much easier. I hate corrosion. And it helps with carbon tracking and shorting of Coil Wires, Spark Plug Wirings because it is non-conductive. However, on some connectors, like the Coil on Plug (CoP) Electrical Connectors, Sensor Connectors, and the like, You should not put it on the Pins and Sockets (meaning Electrical Transfer Point) of the Connector, because it is non-conductive. I believe this can reduce the signal (or increase the voltage drop) thru these Connectors, where you need a strong signal. - Stiles

[@joeturpening335]

Did you ever check the ohms on the new coil, and also the old coil you replaced?

[@StilesAutomotive]

Joe, Yep It did a video to check the COP Coil (link below), Ya know, with these Coils, sometimes just removing the Coil, reseating it on the Plug and reseating the Electrical Connector improves the Coil performance. I'm not absolutely convinced that the Coil was bad, but replacement corrected the fault. Of course, cracked Coil Boots and other things contribute to a bad Coil too. - Stiles
Bench Test Ford CoP (Coil on Plug) Coil Motorcraft DG511 {#3L3Z12029BA} - 2004 thru 2008 4.6L & 5-4L. ruclips.net/video/6MgZ662wLnc/видео.html