A Combination of a good mechanic and bad parts basically reverts you back to the same as having a bad mechanic. In the shop we have a 2007 Toyota 4Runner which was diagnosed correctly but a counterfeit part caused the diagnosis to derail and go back to square one which is why it's in our shop. In this video we run some tests on the Evap system, a system that most folks and mechanics still don't understand or can diagnose properly. I'll do my best in this video to explain Toyota's intrusive EVAP system, How it works and how to diagnose some of it's common problems. TCCN Automotive Inc. Toyota and Lexus Specialist Repair Visit www.tccnautomotive.com to schedule your appointment today. Check out the second channel : https://www.youtube.com/channel/UCUPPMkXFBPr-TAAE-CV9Jlg Recommended Tools: Basic Scan Tool https://amzn.to/3Jm6aom Very good DIY Scan Tool https://amzn.to/3zF7dvH Advanced Scan tool https://amzn.to/3q3L3QQ Spill Free Coolant Replacement Funnel https://amzn.to/3uJfKxm Sun roof drain cleaning tool https://amzn.to/3GMDlQ9 Good DIY Torque Wrench 1/2" https://amzn.to/3gE9bnw Wireless Apple CarPlay for Toyota\Lexus https://amzn.to/3uKElSo Very Good Triple Camera Borescope https://amzn.to/3MrgFs0 *as an Amazon associate, I earn from qualifying purchases. Follow the channel on Social Media : http://www.facebook.com/thecarcarenut http://www.instagram.com/thecarcarenut Check out the channel Merch store https://www.youtube.com/channel/UCEKt2bUDBoRUw3wpPpDOUaA/store Support the channel on Patreon: http://www.patreon.com/thecarcarenut Make a one time donation to the channel: http://www.paypal.me/CCNdonate Check out the amazon store: http://www.amazon.com/shop/thecarcarenut *as an Amazon associate, I earn from qualifying purchases. #thecarcarenut #tccnautomotive #toyota #lexus 0:00 Intro 1:21 Evap Diagnosis Basics 2:39 First Diagnosis Method 8:31 Diagnosis Verification 10:20 EVAP System\Test Explained 18:19 Under Car Inspection