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Home >> Oldsmobile >> 1963 >> Dynamic Base, Eng CD JS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> ROCHESTER 4GC 4-Barrel >> Adjustment >> Intermediate Choke Rod (Choke Piston) >> Oldsmobile Models
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Oldsmobile Models

With fast idle correctly adjusted, position fast idle screw on high step of fast idle cam and raise intermediate choke lever to full UP position. Remove all lash from rods in slots. Choke piston should be flush with end of choke piston bore (see Fig 1). To adjust, bend intermediate choke rod as required.

Fig 1: INTERMEDIATE CHOKE ROD ADJUSTMENT (EXCEPT OLDSMOBILE)
G09353186Courtesy of GENERAL MOTORS COMPANY
Fig 2: INTERMEDIATE CHOKE ROD ADJUSTMENT (OLDSMOBILE)
G09353187Courtesy of GENERAL MOTORS COMPANY