Altitude Compensation System

Disconnect each of the high altitude compensation system air hoses from carburetor. See Fig 1 . Check high altitude compensator by blowing through each disconnected air hose. At altitudes higher than 1640 feet, air should pass through each hose. At lower altitudes no air should pass through hoses.

Fig 1: Checking High Altitude Compensator system

Courtesy of MAZDA MOTORS CORP.