Altitude Compensating Adjustment

Fig. 414 IDLE SPEED AND FUEL AMOUNT SCREW LOCATION:

The following adjustments must be made for vehicles used at altitudes above 1,219 meters (4,000 feet) Fig. 414. :



Increase injection timing:
Increase (advance) injection timing by 0.07mm (0.0028 in) for each 1,000 meters (3,300 ft.) above 1,219 meters (4,000 feet).

EXAMPLE:
For an altitude of 2,000 meters (6,600 ft.) above sea level, calculate injection timing as follows:
0.85mm is normal setting.

2,000 meters
0.85mm + ( --------------- x 0.07 ) = 0.99 mm
1,000 meters

0.99 mm = high altitude setting.


Reduce fuel injection amount:
Reduce by 2.3 mm3/stroke for each 1,000 meters (3,300 ft.) above 1,219 meters (4,000 feet).
This corresponds to counter-clockwise turning of the adjustment screw by 35°.

EXAMPLE:
For an altitude of 2,000 meters (6,600 ft.) above sea level, calculate injection setting as follows:

2,000 meters
--------------- x 35° = 70°
1,000 meters

Fuel injection adjustment screw should be turned 70° counter-clockwise.