System Too Lean (P0171, P0174) - Vacuum Leak Quick Test - Ford 5

  • 8 years ago
engine performance diagnostics, technician training, auto technician training, rosedale tech, auto repair, ASE L1, how-to, DIY auto repair, vacuum leak test, vacuum leak, how to locate a vacuum leak, STFT, LTFT, how to read fuel trim data, rough idle, stalling, poor gas mileage, water test, how to use freeze frame data

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