2002 Ford Escape 3.0 Misfire - ignition coils connected wrong

This vehicle came in with a long history, a severe misfire complaint that two shops couldn’t fix, and lots of parts changing along the way. Testing and careful analysis led to a surprising fix. All of the testing methods shown can be applied to any vehicle with a coil-on-plug ignition system.

Engine Performance Diagnostics chapter 1 page 2, 14 - 21

Symptoms
- severe misfire
- check engine light (P0300)
- intermittent backfiring through intake

Fix
- correct swapped #4 and #6 ignition coil connectors

Tests shown
- how to perform a cylinder balance test (power balance)
- using a coil-on-plug adapter with a lab scope for secondary ignition waveforms
- analyzing secondary waveform attributes during misfire diagnosis
- how to perform a relative compression test
- how to use a coil current ramp as a sync trace
- setting up a lab scope for various testing methods
- how to use an in-cylinder pressure transducer to verify spark timing
- how to get a primary ignition waveform (safely)

Tools used
- scan tool http://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=60df1b5cf6e5582af6ff81c728f42d0d&go=http://www.aeswave.com/Autel-MaxiSYS-MS908-Diagnostic-System-with-Wireless-VCI-p9202.html
- Picoscope automotive 4 channel lab scope http://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=60df1b5cf6e5582af6ff81c728f42d0d&go=http://www.aeswave.com/PicoScope-4425-4-Channel-Standard-Diagnostic-Kit-p9276.html
- Fluke PV350 pressure transducer https://www.jbtoolsales.com/fluke-pv350-pressure-vacuum-module/#oid=1014_1
- inductive low amp probe http://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=60df1b5cf6e5582af6ff81c728f42d0d&go=http://www.aeswave.com/Current-Probe-Low-range-Generic-brand-p8486.html

Playlist
- (Chapter 1) Misfire ID, Compression Tests, Vacuum Leaks, Fuel Trim, Head Gasket, Restricted Exhaust, Low Power, DMM
https://www.youtube.com/playlist?list=PL5E3AEC36DB838BB1

Related videos
- 2004 Mazda MPV Low Power Case Study
https://youtu.be/rzkYNM9hClY
- Ignition testing with a scope (Secondary Waveforms) - open plug wire
https://youtu.be/iFLaRd_5wc8
- Secondary Ignition Waveforms (common faults)
https://youtu.be/SUShO72Grq8
- How to determine which cylinder is misfiring (cylinder drop test)
https://youtu.be/5ewJIBS9L98
- How to check for a jumped timing chain or belt
https://youtu.be/pKic89CIPlM

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 https://www.scannerdanner.com/join-scannerdanner-premium.html There is a 14 day free trial.
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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.

Видео 2002 Ford Escape 3.0 Misfire - ignition coils connected wrong канала ScannerDanner