How to find a shorted coil on a Ford 5.4 engine (misfire diagnosis)

How to troubleshoot a bad coil on a coil over plug system, using a scope and a low amp probe. There are other ways to isolate the problem. You can move the suspect coil to another cylinder and see if the misfire code moves with the coil. But this test is not always reliable.

Symptoms
- misfire
- hesitation
- check engine light with misfire codes
- low power

Fix
- replace shorted ignition coil

Tests shown
- how to measure ignition coil current from the fuse box
- how to sync the coil patterns to identify specific cylinders
- how to set up a lab scope for ignition coil primary current tests
- what a shorted coil secondary waveform looks like

Tools used
- Lab Scope
- Scan Tool
- Low amp probe

Related Videos
- How to identify a shorted ignition coil (Honda)
https://youtu.be/jfIG0dk_09s
- Ford 5.4 shorted coil primary winding and bad computer driver
https://youtu.be/y4r5OcHN5Lg
- How to test for a shorted ignition coil with a scope (Lexus)
https://youtu.be/mvP75-ko_DE
- How to test for a shorted ignition coil (Honda Distributor)
https://youtu.be/hd_bTCsnD7s
- How to test for spark with a test light (GM distributor ignition system) https://youtu.be/mDKj19Hnhd0
Playlist
- (Chapter 22) No Spark Troubleshooting, Ignition Coil & Module Testing
https://www.youtube.com/playlist?list=PLAFYVCyenqcpihCBcez4sWLv5x2FHNnq-

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
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Видео How to find a shorted coil on a Ford 5.4 engine (misfire diagnosis) канала ScannerDanner