Air Relief Valve
The air relief valve is defective when boost pressure is below 7.5 psi (.53 kg/cm2 ) and air is being relieved. This can be detected by a loud hissing sound. Replace the air relief valve if defective.
The air relief valve is defective when boost pressure is below 7.5 psi (.53 kg/cm2 ) and air is being relieved. This can be detected by a loud hissing sound. Replace the air relief valve if defective.