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Home >> Mazda >> 1981 >> RX-7 GSL, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Idle Compensation System >> Testing >> Altitude COMPENSATOR

Altitude COMPENSATOR

NOTE: Altitude compensator can only be checked at altitudes of 1640-4920 feet.
  1. Remove air cleaner and start engine. Engine should idle smoothly. Place finger over slow port inside carburetor bore (located on right side of rear bore). With slow port covered, idle speed should drop. If idle speed does not drop, stop engine and remove compensator valve.
  2. With compensator valve removed, blow through drilled passages. Air should pass through valve from both passages at altitudes of 1640-4920 feet. If not, replace altitude compensator valve.
Fig 1: Mazda RX7 Altitude Compensator
G09313965Courtesy of MAZDA MOTORS CORP.
Fig 2: Mazda RX7 Throttle Opener
G09313966Courtesy of MAZDA MOTORS CORP.
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