Using a smoke machine to find a vacuum leak in a 2001 F150. codes PO171, PO174 fixed!

2001 F150 5.4 Lean Codes P0171 & P0174 FIXED | Vacuum Leak Found with Smoke Machine! Got a check engine light with lean codes P0171 and P0174 on your 2001 Ford F150 5.4L? In this video, I show you exactly how I diagnosed and fixed a vacuum leak causing both banks to run lean using a smoke machine. Using the Auto Line Pro vacuum smoke machine (bought on Amazon), I quickly discovered a hidden broken vacuum hose that wasn't visible during a regular inspection. After replacing the damaged section of vacuum line and resetting the ECU, the codes never came back — problem solved! What you’ll see in this video: Symptoms of lean codes P0171 & P0174 How to use a smoke machine to find vacuum leaks Step-by-step diagnosis on a Ford F150 5.4 Triton engine Quick vacuum line repair and code reset How to clear check engine light and prevent it from returning If you're dealing with lean codes, vacuum leaks, or Ford 5.4L engine issues, this video will help you save time and money with a proven DIY fix. Don’t forget to like, comment, and subscribe for more auto repair tips and diagnostics! #F150LeanCodes #P0171P0174Fix #VacuumLeak #SmokeMachineTest #FordF150 #5Point4Triton #AutoLinePro #CheckEngineLightFix #DIYCarRepair #VacuumLeakDiagnosis