Causes of lean condition trouble codes P0171, P0174 - GM 5 3L

The vehicle being worked on is a 2004 Chevy Suburban with a 5.3L engine. It had multiple trouble codes in memory P0171 and P0174 (fuel system too lean bank 1 and 2) a P0101 (MAF circuit out of range) and a P0300 (engine misfire detected). All of these were related to one single problem. Engine Performance Diagnostics chapter 1 pages 4-12 Symptoms - rough idle, especially cold - check engine light (P0171, P0174, P0101, P0300) - poor gas mileage - hesitation on acceleration - runs much better with engine warm Fix - replace intake manifold gasket Tests shown - how to use freeze frame data to determine type of lean condition - how to interpret fuel trim data - how to locate a vacuum leak with water - how to smoke test and intake manifold - how to know what trouble codes to fix first Tools used - scan tool - smoke machine - water bottle Playlist - (Chapters 4 and 5) Fuel Trim and Oxygen Sensor Testing https://www.youtube.com/playlist?list=PLD2809EEC7BAAF989 Related videos - Understanding Short Term and Long Term Fuel Trim (an SD Premium video) https://youtu.be/oRX2V6_a3dc - How to find a vacuum leak with water https://youtu.be/cuod8-zFSQ4 - Misfire caused by a vacuum leak https://youtu.be/OH_U3D4S5Q4 - Ford F-150 P0171 P0174 Trouble Codes - vacuum leak (water test) https://youtu.be/K-on2hbYUCc - Idle Speed Problems P0507 caused by a vacuum leak https://youtu.be/tJgrHkuqcC8 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.