1979 Models
Place transmission in Neutral. Move cam follower onto highest step of fast idle cam (unless specified otherwise on decal). Disconnect and plug vacuum hose at EGR valve if so equipped. Turn fast idle speed screw to obtain specified RPM.
1979 COLD (FAST) IDLE RPM SPECIFICATIONS
| Application | Man. Trans. | Auto. Trans. | ||
|---|---|---|---|---|
| Heavy Duty | 1900 | 1900 | ||
| Light Duty | (1) 1600 | 1600 | ||
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