MAF, IAT and Misfire Trouble codes: In this video I show you how to quickly test the MAF and IAT sensors, then verify the cause of the misfire (spark, fuel and compression), Then we focus on the ignition coil and how to test it.
Video breakdown:
- 1:03 cranking compression sound test
- 2:00 snap-throttle tests for a misfire, surge problem found
- 2:54 trouble codes P0113, P0102, P0308
- 3:56 MAF sensor testing and normal operating range
- 4:53 IAT (thermistor) scan data unplugged reaadings
- 5:25 SD Premium reference for Chapters 6 and 12
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- 5:53 MAF sensor connector
- 7:31 MAF voltage on scan tool during snap-throttle test
- 7:52 beginning of misfire diagnostics
- 8:55 using fuel trim to determine spark or fuel misfire
- 10:23 global OBD II mode 6 data (test ID $53)
- 11:26 advice for my friend on what to do to fix this truck, review of the tests we did
- 13:15 ignition coil current test from the fuse box
- 14:07 in line fuse jumpers pros and cons
- 19:05 videos on shorted coils on Fords
• Ford 5.4 shorted coil ...
• How to find a shorted ...
- 20:18 power balance (cylinder contribution test) with scan tool
- 21:38 under hood testing begins of the ignition system
- 22:30 RPM drop test by unplugging coils
- 23:22 visual inspection on the number 8 coil
- 24:22 spark test with a test light on the #8 coil
- 27:45 ScannerDanner Premium link
- 30:04 spark test on a known good coil for comparison
ScannerDanner Tools:
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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.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
Disclaimer:
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.
11 июн 2018
