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L1: Fuel Systems and Air Induction Systems

2 Signs of a Bad Fuel Pressure Regulator Failing Symptoms Leaks (2:16) (2020) (Better)

2003 Altima Stalling, Negative Fuel Trims (17:24) (2018) (Good)

3 Signs of a Bad Accelerator Pedal Position Sensor Failing Symptoms Relearn P2122 P2123 P2127 P2128 )2:13) (2020) (Better)

3 Symptoms of a Bad Air Fuel Sensor and Why It Is Different from an Oxygen Sensor (3:00) (2021) (Better)

4 Signs of a Stuck Open Fuel Injector Failing Symptoms (1:47) (2021) (Better)

5 Signs Your Idle Air Control Valve Is Bad or  Failing Symptoms High and Low (2:26) (2019) (Better)

Advanced Fuel Trim Diagnostics (1:05:42) (2020) (Good)

All You Need to Know About Toyota Oxygen Sensors and AF Sensors (26:57) (2021) (Better)

Car or  Truck With Low Power or  Hesitation? Code P0171 Low Fuel Trim Diagnostic (4:16) (2021) (Best)

Check Engine Light? Car Knock Sensor Low Input - Code P0327 P0332 (4:23) (2020) (Best)

Check Engine Light? Codes P0446, P0455: What Causes a Car EVAP Code? (5:27) (2020) (Best)

Check Engine Light? O2 Sensor Heater Circuit Malfunction - Code P0141 (6:50) (2020) (Best)

Check Engine Light? System Too Lean - Code P0171 or  P0174 On Your Car or  Truck (9:14) (2020) (Best)

Cold Start Rough Idle? How to Diagnose Trouble Codes P050D and P219A (4;44) (2021) (Best)

Engine Pinging When Accelerating Spark Knock Pre Ignition Lack of Power Low and High Rpm Noise (4:06) (2020) (Better)

Fuel Injector Voltage and Current Tests- Diagnostic Quick Tips Snap-On Training Solutions (3:14) (2015) (Best)

Fuel Trim Imbalance Case Study, Presented By John Thornton (4:12) (2020) (Best)

Fuel Trims – Oxygen Sensor Basics—How They Work and How to Test and Diagnose Them (O2, HO2S) (1:11:56) (2017) (Better)

Fuel Trims and the Tuning Process (5:43) (2019) (Best)

Fuel Trims: Introduction and Overview (12:03) (2021) (Better)

How to Diagnose a Failed Car, Truck and SUV Fuel Pump (4:14) (2020) (Best)

How to Test Ethanol Content in Fuel (8:25) (2020) (Better)

Intermittent Stumble, Rough Running, Stall Concern. No Check Engine Light or  Codes 2009 Kia Rio (1:27:19) (2019) (Better)

Lag, Hard Start, Stall? Diagnose Car and Truck Low Fuel Pressure! (19:30) (2020) (Best)

Most Common Symptoms of Bad Fuel Filter Signs You Need to Change Fuel Filter Starting Issues (2:37) (2021) (Good)

Negative Fuel Trim and Fuel Economy Maintenance Minute (1:43) (2018) (Best)

Rich Condition Diagnosis or Is It?! Scan Tool Only - 2014 Toyota Sienna P0172 P0175 (14:37) (2021) (Better)

Rough Running and Stalling? Using a Scan Tool to Diagnose the MAF in Your Car (6:34) (2020) (Best)

Rough Running? Bad Mileage? How to Diagnose Car and Truck Fuel Injectors! (5:41) (2020) (Best)

Simple Fuel Trims Explanation (13:30) (2020) (Better)

Spark Plugs and Engine Noise (2:09) (2020) (Best)

Symptoms of a Bad Oxygen Sensor (3:51) (2021) (Better)

Symptoms of a Bad Oxygen Sensor Failing (3:21) (2021) (Better)

Symptoms of a Clogged Fuel Injector (4:25) (2021) (Better)

Techshop's Tool Minute: Interpreting Fuel Trims (3:35) (2020) (Better)

Testing For Water in Gasoline (2:36) (2018) (Better)

The Trainer #65: Fuel Trim Explained - What It Is , How It Works, and What It Can Tell You (21:43) (2017) (Good)

Using O2 Sensor Data in Diagnostics (3:13) (2020) (Better)

Using Short and Long Term Fuel Trims in Diagnostics (4:02) (2020) (Better)

Weak Acceleration? Rough Idle? Diagnose a Car or  Truck Throttle Body (7:47) (2020) (Best)

What's a Manifold Absolute Pressure (Map) Sensor and How to Diagnose It On Your Car or  Truck (5:53) (2020) (Best)