Cruise Control: Adjustments

Fig. 20 Speed control lock-in screw adjustment. 1980-82:

Fig. 21 Speed control lock-in screw adjustment. 1983-87:

LOCK-IN SCREW ADJUSTMENT

Lock-in accuracy will be affected by poor engine performance (need for tune-up), loaded gross weight of car (trailering), or improper slack in control cable. After the foregoing items have been considered and the speed sags or drops more than 2 to 3 mph when the speed control is activated, the lock-in adjusting screw should be turned counterclockwise approximately 1/4 turn per one mph correction required.
If a speed increase of more than 2 to 3 mph occurs, the lock-in adjusting screw should be turned clockwise 1/4 turn per one mph correction required. This adjustment must not exceed two turns in either direction or damage to the unit may occur.

Fig. 22 Speed control servo throttle cable adjustment:

THROTTLE CABLE ADJUSTMENT

Optimum servo performance is obtained with a given amount of freeplay in the throttle control cable. To obtain proper freeplay, insert a 1/16 inch diameter pin between forward end of slot in cable end of carburetor linkage pin (hair pin clip removed from linkage pin). With choke in full open position and carburetor at curb idle, pull cable back toward dash until all free play is removed. Tighten cable clamp bolt to 45 inch lbs., remove 1/16 inch pin and install hair pin clip.