This owner of this truck installed a new plug and coil on the #6 cylinder and still continued to have a misfire. Knowing this information affected my approach. I start this process with an injector balance test and confirmed cylinder compression before moving to the ignition system.

Engine Performance Diagnostics chapter 22

Symptoms
misfire (P0306)

Fix
repaired corroded power feed wire to the ignition coil

Tests shown
fuel injector balance (flow) test
how to test a 3 wire coil over plug ignition coil
coil primary current ramp test with a scope
how to locate an open wire

Tools used
fuel pressure gauge
scan tool
inductive low amp probe
digital multimeter

Playlist
(Chapter 22) No Spark Troubleshooting, Ignition Coil & Module Testing    • (Chapter 22) No Spark Troubleshooting...  

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   • How to identify a shorted ignition co...  
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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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