How to Read Fuel Trims — LEAN vs RICH With Real Live Data

🛠️ SCAN TOOLS I RECOMMEND ✅ Professional Scan Tool – TOPDON ONE This is the professional diagnostic scanner I use in my videos. 👉 https://amzn.to/3TQlKU6 ✅ Budget-Friendly Scan Tool You don't need to spend thousands of dollars to start learning automotive diagnostics! Here's a more affordable option for reading live engine data, including STFT and LTFT. 👉 https://amzn.to/47gAzCn As an Amazon Associate, I earn from qualifying purchases at no additional cost to you. Ever wonder what actually happens to your fuel trims when an engine runs LEAN or RICH? In this video, we're getting under the hood and watching the live scan tool data change in real time! I'm going to show you how short-term fuel trims (STFT) and long-term fuel trims (LTFT) work, what positive and negative numbers actually mean, and how your engine's computer responds when something isn't right. We're not just talking theory. We're demonstrating real-world fuel trim behavior so you can see what's happening instead of guessing! 🔧 IN THIS VIDEO: What STFT and LTFT actually mean How to read positive and negative fuel trims What happens when an engine runs LEAN What happens when an engine runs RICH How fuel trims react to changes in the air/fuel mixture Why understanding live data can save you from replacing perfectly good parts Whether you're a DIY mechanic, professional technician, or just trying to figure out why your check engine light is on, understanding fuel trims is one of the most valuable skills you can learn when diagnosing engine performance problems. Remember: A trouble code tells you where to start looking. Live data helps you figure out what's actually happening! 👍 If this video helped you, hit that LIKE button! 🔔 SUBSCRIBE to TrueTech Mobile Repairs for real-world automotive diagnostics, electrical troubleshooting, and practical repair tips without all the unnecessary BS! 💬 DROP A COMMENT: What's the most confusing thing about fuel trims you've run into? I might cover your question in a future video! #FuelTrims #AutomotiveDiagnostics #LeanVsRich #STFT #LTFT #MechanicTips #TrueTechMobileRepairs