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 MANUALSGMC1983PICKUP C1500, 6.2 C, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMCARBURETOR - ROCHESTER E4ME 4-BBLADJUSTMENTSCHOKE ROD (FAST IDLE CAM)
1983 GMC Pickup C1500, 6.2 C, Standard
Choke Rod (Fast Idle Cam)
1983 GMC Pickup C1500, 6.2 C, StandardSECTION Choke Rod (Fast Idle Cam)
NOTE:
Choke coil lever adjustment must be correct before performing this adjustment. Fast idle speed adjustment must be performed using the Emission Control Tune-Up Decal with carburetor installed and vehicle running. Adjustment is performed with choke valve angle gauge. See procedure at beginning of Adjustments. DO NOT
remove rivets and choke cover to perform this adjustment.
- Attach rubber band to Green tang of intermediate choke shaft. Open throttle to allow choke valve to close. Set up angle gauge.
- Place fast idle speed cam follower on second step of fast idle cam against shoulder of highest step. If cam follower does not contact cam, turn in fast idle speed screw additional turns. See Fig 1.
- Bubble on choke angle gauge should be centered with specified angle mark opposite pointer.
- To adjust, bend tang on fast idle cam until bubble of choke valve angle gauge 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.