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 MANUALSCHEVROLET1966CHEVY II BASE, NOT AVAILABLE, 2.5L ENG, AUTOMATIC TRANS, TRANS MFR CD THM400REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALFUEL SYSTEMCARTER YF SINGLE BARRELADJUSTMENTFAST IDLE LINKAGECARBURETORS WITH SEPARATE AUTOMATIC CHOKE
1966 Chevrolet Chevy II Base, Not Available, 2.5L Eng, Automatic Trans, Trans Mfr CD THM400
Carburetors with Separate Automatic Choke
1966 Chevrolet Chevy II Base, Not Available, 2.5L Eng, Automatic Trans, Trans Mfr CD THM400SECTION Carburetors with Separate Automatic Choke
Check and adjust as follows:
- With choke valve fully closed, there should be slight clearance (.015" maximum) between fast idle cam and boss on carburetor bowl (see Fig 1). Adjust by bending choke connector rod at the angle.
- With choke valve fully closed, close throttle valve. Index mark on fast idle cam should be aligned with upper edge of fast idle tang on throttle lever. Adjust by bending fast idle tang up or down as necessary.
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.