Air Pump
Disconnect outlet hose at air pump. Start engine and check for air at outlet. Pump is operating properly if air flow from outlet increases with engine speed. If defective, seized or abnormally noisy, replace pump as an assembly.
Disconnect outlet hose at air pump. Start engine and check for air at outlet. Pump is operating properly if air flow from outlet increases with engine speed. If defective, seized or abnormally noisy, replace pump as an assembly.