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Short Term and Long Term Fuel Trims Explained [LIVE]

In this live demonstration, I break down the relationship between short-term fuel trim and long-term fuel trim and how they adapt to changing engine conditions. Using my own car as the test subject, I intentionally created a vacuum leak to show how fuel trims react and adapt over time. Watch as the short-term fuel trim initially compensates for the lean condition before the long-term fuel trim adjusts to stabilize the air-fuel mixture and bring the short-term readings back closer to zero. We also dive into an interesting diagnostic insight: even though the fuel trims show a lean condition (adding fuel), the oxygen sensors (O2 sensors) still read lean instead of rich. This anomaly highlights the critical role of O2 sensors in influencing fuel trim calculations and why understanding sensor behavior is key to effective diagnostics. Key takeaways covered in this video: What is a fuel trim? How does short-term fuel trim differ from long-term fuel trim? The role of O2 sensors in fuel trim adjustments. Why a vacuum leak causes the engine to show lean fuel trims. Real-time waveform and data analysis of fuel trims and O2 sensors. If you've ever asked, "Do O2 sensors affect fuel trim?" or "What is long-term fuel trim?", this video is for you! You'll gain practical knowledge of how fuel trims interact with the oxygen sensor and how to interpret these readings during diagnostics. Don't miss this live and practical lesson on understanding and diagnosing fuel trims and oxygen sensor behavior! 🚗💨 🔧 Want to become an expert in automotive diagnostics and repairs? Join our online training community today! Gain access to exclusive content, live Q&A sessions, and connect with fellow car enthusiasts. Click the link in the description to sign up now! 🔧 👥 Join my online automotive community with a FREE 3-day trial and get access to exclusive content: https://masterautomotivetraining.podi... ✅ Buy your own Topscan Here https://www.amazon.com/dp/B0C3QQYQ1B?... 🛠️ Get your own Otofix D1 Lite Scanner using the link below: https://amzn.to/4fYTJjc USE CODE: Oscar8888 to get 10% Off!! ✅ Get your FREE Emission's e-book TODAY! ➡️ https://page.smartautotraining.com/in... ✅ Master Automotive Training ➡️ https://www.smartautotraining.com ✅ Online Student Store ➡️ https://masterautomotivetraining.com/ ✅ Instagram ➡️   / masterautotraining   ✅ Facebook ➡️   / mautotraining   ✅ TikTok ➡️ https://vm.tiktok.com/ZMeatXtNh/