In this video I will show you how to identify which cylinder is misfiring using just a scan tool and basic test light. This test can be used when you have a constant misfire on one or more cylinders. Once the specific cylinder is isolated, further testing may be needed to determine whether it is a spark, fuel or compression problem.
Engine Performance Diagnostics chapter 22
Symptoms
- constant misfire
- check engine light (P0300, P0305)
Fix
- replace faulty ignition coil assembly
Tests shown
- RPM drop test
- how to short out each plug wire with a test light
- how to determine if the coil is bad or if there is a control issue
Tools used
- scan tool
- incandescent test light
Playlist
- (Chapter 22) No Spark Troubleshooting, Ignition Coil & Module Testing [ Ссылка ]-
Related videos
- How to identify a shorted ignition coil (Honda)
[ Ссылка ]
- Misfire Case Study (1999 Honda Accord)
[ Ссылка ]
- Misfire caused by a vacuum leak
[ Ссылка ]
- Ignition testing with a scope (Secondary Waveforms) - open plug wire [ Ссылка ]
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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Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.
