Exhaust Backpressure Testing (known bad compared to known good)

توضیحات:

In this video I will show you how to test to see if your catalytic converter is plugged or restricted. I will be showing you an exhaust system with a plugged cat. and will compare the results to a known good exhaust system. I will also show some alternate locations to perform an exhaust backpressure test.

Engine Performance Diagnostics pages 8 and 28

Symptoms
- very low power
- cannot accelerate past 30 mph
- pinging under load
- transmission doesn't shift right

Fix
- replace catalytic converter
- repair any misfire and fuel trim issues

Tests shown
- how to test exhaust back-pressure
- exhaust back-pressure test using an EGR pressure sensor port
- exhaust back-pressure test using the upstream O2 port

Tools used
- exhaust back-pressure test kit
- vacuum/pressure gauge

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
- How to test for a restricted exhaust using the DPFE sensor on a Ford https://youtu.be/JIU8j4YBZxw
- O2 sensor (fixed lean) and restricted exhaust test (melted cat) - GM https://youtu.be/UkyM1L_xbaU
- How to test for a restricted exhaust (catalytic converter)
https://youtu.be/9TlygJMxTps
- How to test for a plugged exhaust (picoscope & psi transducer)
https://youtu.be/kO91s0CoM_4

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.

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