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 MANUALSGMC1983VALUE VAN P2500, 6.2 J, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEADJUSTMENTTUNE-UP - 4.8L 6-CYL VIN [T]COLD (FAST) IDLE RPM
1983 GMC Value Van P2500, 6.2 J, Standard
Cold (Fast) Idle Rpm
1983 GMC Value Van P2500, 6.2 J, StandardSECTION Cold (Fast) Idle Rpm
Place cam follower on high step of fast idle cam. Support lever with pliers and bend tang in or out to adjust fast idle RPM.
NOTE:
On models with manual choke, rotate fast idle cam clockwise to farthest "UP" position.
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.