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HOMESERVICE MANUALSCHEVROLET1966CAPRICE 4D HARDTOP, 4.6L ENG, NOT AVAILABLE TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALFUEL SYSTEMCARTER AVS 4-BARRELADJUSTMENTIDLE SPEED & MIXTURE
1966 Chevrolet Caprice 4D Hardtop, 4.6L Eng, Not Available Trans

Idle Speed & Mixture

1966 Chevrolet Caprice 4D Hardtop, 4.6L Eng, Not Available TransSECTION Idle Speed & Mixture
NOTE: If initial adjustment required to warm up engine, turn both idle mixture screws out 1 1/2 turns from a lightly seated position, turn throttle stopscrew in 1/2 turn from point where it contacts throttle lever. Make idle adjustments with Automatic Transmission in Drive and Air Conditioner ON. Proceed as follows:

With engine at normal operating temperature (choke valve wide open and fast idle inoperative), attach tachometer and vacuum gauge, adjust engine idle speed to correct engine RPM (see Specifications), then adjust each idle mixture screw for smooth idle at highest steady vacuum and highest engine RPM

CAUTION: (Hot idle compensator in air horn must be held closed while making this adjustment.)

Recheck engine idle speed. If necessary to readjust idle speed, repeat idle mixture adjustment.

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.