Low power, lean conditions (cracked air intake tube) GM

Amazing how many parts were thrown at this vehicle to fix this simple problem. This is what happens when you do not know how to troubleshoot and start replacing parts based on symptoms alone. So follow along and let me teach you some fundamental tests that I use on every vehicle that has a low power complaint. Symptoms: - low power - hesitation problem - surging and bucking - misfire - MAF sensor trouble codes - lean exhaust trouble codes (P0171, P0174) Fix: - replace torn air intake tube behind the MAF sensor Test procedures shown: - How to use oxygen sensor signals at wide open throttle to identify the cause of a low power complaint - how to determine if the MAF sensor is producing the proper peak signals - How to properly test fuel pressure Related videos: - MAF and lean codes from a missing air filter (P0171, P0174, P0102) https://youtu.be/m-qJ58scPJE - How to identify and clean a Dirty MAF Sensor https://youtu.be/QwGICKqWgM4 - How to identify and clean a dirty MAF sensor https://youtu.be/CEKjjXNLTjk - How to test for a restricted exhaust (catalytic converter) https://youtu.be/9TlygJMxTps Playlist: - (Chapter 12) Mass Airflow Sensor Testing https://www.youtube.com/playlist?list=PLAFYVCyenqcrUtzoyk65FMfo9pxhK6Vay 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.