323 L4-1600 1597cc (1986)
Altitude Compensator: Testing and Inspection
Fig. 17 High altitude compensation system.
Fig. 18 Connecting vacuum pump.
This procedure is for sea level areas only.
1.
Warm engine to operating temperature and run at idle.
2.
Ensure ignition timing is approximately 7° BTDC with vacuum connected.
3.
Connect vacuum pump to atmospheric pressure sensor Fig. 18.
4.
Apply a vacuum of 4.72 inches Hg and ensure ignition timing is approximately 13° BTDC.
5.
If system is not operating satisfactorily, test atmospheric pressure sensor and engine control unit as described in ``Gasoline Fuel Injection.''