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.
Dashpot System
This system slows closing of throttle. During periods of deceleration, ported vacuum in carburetor acts on the throttle control valve through dashpot check valve to hold throttle open slightly. Fixed orifice in dashpot check valve gradually decreases vacuum until the throttle closes completely.
Speed at which throttle closes is determined by size of fixed orifice in dashpot check valve, throttle return spring tension, and amount of vacuum generated at carburetor port above preset level in dashpot check valve.
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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.