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← ScienceWhich consequence results when exceeding gasoline's vapor pressure limit inside a carburetor?
A)Fuel pump cavitation decreases flow
B)Air-fuel ratio becomes excessively lean✓
C)Volumetric efficiency sees significant increases
D)Engine compression ratios climb quickly
💡 Explanation
Exceeding vapor pressure causes vapor lock via boiling, leading to a lean air-fuel ratio because the fuel flow is disrupted from vapor formation; therefore, the engine runs lean rather than rich, since less fuel vaporizes optimally.
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