Hyundai Coupes/Sedans 1986-1993 Repair Guide

Fuel Check Valve

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The fuel check valve is used on all vehicles to prevent fuel leakage should the vehicle roll over. The valve is connected in the fuel vapor line between canister and overfill limiter. The fuel check valve contains 2 balls and under normal conditions the gasoline vapor passage in the valve is open; if a vehicle roll over occurs, one of the balls closes the fuel passage thus preventing fuel leaks.

 
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