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Residual Pressure

Connect Pressure Gauge (VW-1318) as previously described in SYSTEM PRESSURE. See Figure . Open pressure gauge valve. Operate fuel pump for at least 30 seconds. Shut off fuel pump. Note system pressure. Pressure should be 51 psi (3.6 kg/cm2 ) after 10 minutes and 49 psi (3.4 kg/cm2 ) after 20 minutes.

NOTE: Residual pressure test does not include checking cold start valve. To check cold start valve, reattach fuel line. Operate fuel pump and visually check for leaks.