What would indicate a vacuum leak visually during the VI?

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Prepare for the Smog Check Visual Inspection Exam with multiple-choice questions, detailed explanations, and study materials. Ace your smog check certification!

Multiple Choice

What would indicate a vacuum leak visually during the VI?

Explanation:
Vacuum leaks show up visually as damage to the vacuum hoses that connect the intake and other components. Cracked, split, or disconnected hoses create an opening for air to enter the system, which derails the intended air–fuel balance and can cause idle problems or rough running. In a visual check, the clearest signs are hoses that are cracked, split, brittle, swollen, or that have come loose at their fittings. Hoses with stickers aren’t an indicator of a leak, and hoses that are hot aren’t a reliable sign of a vacuum leak. While hoses out of place can point to routing issues, the direct visual cue of a leak is damaged or disconnected hoses.

Vacuum leaks show up visually as damage to the vacuum hoses that connect the intake and other components. Cracked, split, or disconnected hoses create an opening for air to enter the system, which derails the intended air–fuel balance and can cause idle problems or rough running. In a visual check, the clearest signs are hoses that are cracked, split, brittle, swollen, or that have come loose at their fittings. Hoses with stickers aren’t an indicator of a leak, and hoses that are hot aren’t a reliable sign of a vacuum leak. While hoses out of place can point to routing issues, the direct visual cue of a leak is damaged or disconnected hoses.

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