Anyone looking for information on checking engine timing with a scope, look no further! I have the opportunity to show several different methods of testing on this Buick with a chain problem, and how you can be confident in your call. We also get to see another variable with the relative compression test, which can bite you if you’re not careful.
Engine Performance Diagnostics chapter 1
Symptoms
- crank no start
- spark and fuel present
- no excessive exhaust backpressure
Fix
- corrected the jumped timing chain
Tests shown
- how to listen for compression during cranking
- how to use an incandescent test light to check for spark
- performing a relative compression test with an ignition sync
- analyzing relative compression waveforms for timing issues
- using a lab scope to check cam/crank relationship
- using an in-cylinder pressure transducer
- how to perform a cranking vacuum test by covering the throttle body
- analyzing cam/crank waveforms in detail
Tools used
- PicoScope 4425 4 Channel Standard Diagnostic Kit
[ Ссылка ]
- WPS500X Pressure Transducer Kit
[ Ссылка ]
- Inductive High Amp Current Probe
[ Ссылка ]
Playlist
- (Chapter 1) Misfire ID, Compression Tests, Vacuum Leaks, Fuel Trim, Head Gasket, Restricted Exhaust, Low Power, DMM
[ Ссылка ]
Related videos
- Honda Civic 1.7L starts, runs, stalls (incorrect timing belt installation)
[ Ссылка ]
- How to identify a broken timing chain - GM 2.2 (part 1)
[ Ссылка ]
- How to check for a jumped timing chain or belt
[ Ссылка ]
- How to perform a compression test with a scope (Verus-Vantage)
[ 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.
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 [ Ссылка ] 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.
