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.
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HOMESERVICE MANUALSCHEVROLET1987R 20 P/U 2WD V8-454 7.4LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTFUEL DELIVERY AND AIR INDUCTIONCARBURETORADJUSTMENTSCHOKE UNLOADER
1987 Chevrolet R 20 P/U 2WD V8-454 7.4L
Choke Unloader
1987 Chevrolet R 20 P/U 2WD V8-454 7.4LSECTION Choke Unloader
Fig. 15 Unloader adjustment:
1. Attach rubber band to green tang of intermediate choke lever, then open throttle to allow choke valve to close.
2. Position magnet on top of choke valve, then rotate bubble until centered. Refer to Specifications and rotate scale until specified degree for adjustment is opposite pointer.
3. Hold secondary lockout lever away from pin, Fig. 15, then hold throttle wide open.
4. To adjust, bend tang on fast idle lever until bubble is centered.
RENDER: 1.0x
NO RELATED
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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.