Secondary Throttle Contour
Open choke valve fully so tang on lockout lever positioned over contoured section of fast idle cam (see Figure). Measure clearance between tang and edge of fast idle cam with a feeler gauge. Adjust by bending tang up or down; clearance should be as follows:
Secondary Throttle Contour Clearance
| Model or Carb. | Clearance |
|---|---|
| Buick(All Models) | .030" |
| 1957-63 Cadillac | .015" |
| 1964 & Later Cadillac | .020" |
| 1964 Chevrolet 7024128 | .030" |
| All Chevrolet Except 7024128 | .015" |
| Oldsmobile (All Models) | .030" |
| 1962 Pontiac Tempest V8 | .030" |
| Pontiac Except 1962 Tempest V8. | .015" |