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.
ROCHESTER 2GC & 2GV 2-Barrel: Adjustment: Notes
If initial adjustment required to warm up engine, set each idle mixture screw 2 turns out (Buick), 1 1/2 turns out (1968 Chevrolet), 3 turns out (1969 Chevrolet), 1 1/2 turns out (Oldsmobile), 4 turns out (Pontiac) from a lightly seated position. On cars with Idle Stop Solenoid, check solenoid position as follows:
NO RELATED
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.