https://stream.echo6.co/videos/watch/be974748-2944-4a5f-acd6-f2b02554a818 2003 Impala 3400 V-6. How to perform an exhaust back-pressure test. Symptoms: very low power (could not accelerate past 30 mph), pinging and detonation Fix:, replace the restricted catalytic converter Testing methods shown:, O2 sensor reading at wide open throttle (shows fuel delivery and direction for our low power complaint), exhaust backpressure test using a gauge installed in the upstream O2 port Tools used:, Snap-on Solus Pro, exhaust back-pressure gauge Related Videos How to test for a restricted exhaust using the DPFE sensor on a Ford https://youtu.be/JIU8j4YBZxw How to test for a plugged exhaust (picoscope & psi transducer) https://youtu.be/kO91s0CoM_4 Exhaust Backpressure Testing (known bad compared to known good) https://youtu.be/Lafv2c4szZY, Playlist: (Chapter 1) Misfire ID, Compression Test, Vacuum Leaks, Fuel Trim, Head Gasket, Restricted Exhaust, Low Power, DVOM https://www.youtube.com/playlist?list=PL5E3AEC36DB838BB1 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. 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. Mon, 04 May 2026 01:28:36 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/be974748-2944-4a5f-acd6-f2b02554a818 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.