Fuel Pacer
NOTE:
Fuel pacer vacuum switch is preset to turn indicator light on at about 4 1/2" of engine vacuum. If a complaint of the indicator light remaining on too much of the time (over sensitivity to engine load), or if light does not come on soon enough (causing extra fuel usage), then switch may be adjusted about ± 1 1/2 in. Hg to compensate for the condition of the complaint.
To adjust vacuum switch, "T" a vacuum gauge into fuel pacer vacuum source. Set parking brake, block drive wheels, start engine, place transmission in "D", and note vacuum reading when fender indicator light begins to glow. If vacuum reading is not to specification, or if sensitivity change is desired, remove yellow cap on vacuum switch and adjust screw to desired vacuum setting. Vacuum setting is increased when screw is turned clockwise, or decreased when screw is turned counterclockwise.
CAUTION:
Do not turn screw more than four turns in either direction, or damage to switch may occur.