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.
Idle Mixture & Speed: Notes
ADJUSTMENT NOTE - If initial adjustment required to warm-up engine, turn idle mixture screw out 1-1 1/2 turns from lightly seated position, turn throttle stopscrew in 1/2 turn from point where it contacts stop on carburetor lower body. Turn on headlights (necessary to place alternator under load). On Auto. Trans, cars, place selector lever in DRIVE. On Air Cond. cars, operate air conditioner for 20 minutes, then set idle speed with Air Conditioner ON. Proceed as follows:
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.