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 MANUALSCHEVROLET1987CHEVY VAN G20, 6.2 C, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISCARBURETOR - ROCHESTER M4ME & M4MEF 4-BBLADJUSTMENTCHOKE UNLOADER
1987 Chevrolet Chevy Van G20, 6.2 C, Automatic
Choke Unloader
1987 Chevrolet Chevy Van G20, 6.2 C, AutomaticSECTION Choke Unloader
- Attach rubber band to tang of intermediate choke shaft. Open throttle to allow choke valve to close. Install choke valve gauge and set angle to specification. See CHOKE VALVE GAUGE .
- Hold secondary lock-out lever away from pin. Hold throttle lever in wide open position. See Fig 1. To adjust, bend fast idle lever tang until bubble of choke valve gauge is centered.
RENDER: 1.0x
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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.