Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
6 Cyl. Hot Idle RPM
Set with choke fully open (all models) and hot idle compensator closed (I-Bbl. carburetors with Air Cond., and all 4-Bbl. carburetors). With carburetor mixture screws backed out 5 turns and idle stop solenoid active, set idle stop solenoid screw to obtain RPM listed in "Preliminary" column in table. Turn mixture screws clockwise to RPM in "Active" column (idle stop solenoid active). DO NOT readjust idle stop solenoid screw. With idle stop solenoid inactive, adjust idle speed screw to RPM in "Inactive" column (solenoid inactive speed). DO NOT readjust mixture or solenoid screws.
| Solenoid | ||||
|---|---|---|---|---|
| Engine | Preliminary | Active | Inactive | |
| 250" 1-Bbl. Synchro-mesh | 730 | 700 | 500 | |
| Auto. Trans. | 610 | 600 | 500 | |
| 1968 4-Bbl. Synchro-mesh | 830 | 800 | 600 | |
NO RELATED
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.