Here we have 2 examples of unmetered air causing lean codes on a Ford and a Chevy. Be sure to check out this Fuel Trim Video: https://youtu.be/0FrOtKJR8Ac
For more information on automotive training check out https://www.handsonautotraining.com/
Equipment that I use:
TopDon Battery Maintainer https://amzn.to/40mubUw
Cardaq Plus 3 https://amzn.to/3Z9F3V1
Astro Meter https://amzn.to/402cIkJ
Break out box OTC https://amzn.to/41f0x3Z
Break out box Go Daig https://amzn.to/3nWCqsK
Quality Test Leads https://www.aeswave.com/Automotive-Test-Lead-Kit-p9121.html
https://amzn.to/3LH5Vsc Pico 2205
Camera equipment that I use in the field
https://amzn.to/40jzpR2 - Sony ZV-1 Camera
https://amzn.to/40hchCA - Tascam Audio Recorder
Studio Camera https://amzn.to/3Jz7A0p
Studio switcher https://amzn.to/3MDU52v