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State Emissions Test - Fuel Filler Cap Test Procedure|Page 722 > < State Emissions Test - Fuel Filler Cap Test Procedure|Page 720

Hatchback 2WD F4-1781cc 18L Fuel Filler Cap — TSBs | Page 721

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Fuel Filler Cap: Description and Operation

Fuel Filler Cap

PURPOSE

Prevents development of a vacuum in the fuel tank in event of fuel vapor line problems and as fuel level varies.

OPERATION

 When vacuum develops in the tank, valve "A" opens to admit air and thus equalize tank pressure.

State Emissions Test - Fuel Filler Cap Test Procedure|Page 722 > < State Emissions Test - Fuel Filler Cap Test Procedure|Page 720