Diagnosing Misfires

On this episode of Fear No Fix, Chris and Jordan break down how to diagnose misfires. Most often, a misfire will result from a problem with the ignition system, so that's the area of focus in this video.

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Top DTCs (Diagnostic Trouble Codes) associated with Misfires:
• P0300
• P0301 through P0312

Top symptoms associated with Misfires:
• Check engine light
• Rough idle
• Stumbling and Vibrations
• Loss of power
• Poor acceleration
• Excessive exhaust smoke
• Abnormal engine noise
• Poor fuel efficiency

Video Sections:

Intro: (0:00)
Reading Live Data (0:35)
Reading Mode 6 (1:41)
Swapping Ignition Coils (2:35)
Swapping Ignition Coils (4:19)
Unplugging Coils (5:52)
Testing Resistance (6:14)
Spark Tester (6:41)
Examining Spark Plugs (7:54)
Testing Spark Plugs (10:06)
Inspecting Plug Wires (11:29)
Outro (12:21)