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.
Secondary Throttle Closing
This adjustment required to ensure proper closing of secondary throttle valves. With primary throttle valves closed in correct curb idle position (see IDLE SPEED ADJUSTMENT ) and with cam follower not contacting fast idle cam, check clearance between actuating link and front of slot in secondary lever when tang on Primary actuating lever is against pin (see Fig 1). This clearance should be.020" (all carburetors). Adjust by bending tang on primary actuating lever as required.
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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.