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.
Automatic Throttle Release System: Operation
On 1977 Pickup and RX3 California models, system does not operate within 30 seconds of cold engine starting with choke knob pulled out. A timer built into the control unit, will act to draw choke knob in to disengage choke, opening choke plate in carburetor. On all models, the coolant temperature sensing switch will open above 134-146°F (57-63°C) and will remain closed below that temperature. System will return choke knob to OFF position as coolant temperature rises above 134-146°F(57-63°C).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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