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Home >> Chevrolet >> 1968 >> Chevy II 2.5L Eng >> Repair and Diagnosis (Single Page) >> Engine Performance >> Tune-Up >> Exhaust Emission Systems - Tune-Up >> Idle Speed & Mixture Adjustment >> Preliminary Idle Speed and Mixture Adjustment >> Vega, Manual Transmission

Vega, Manual Transmission

  1. Turn mixture screw four full turns out from a lightly seated position. With idle stop solenoid de-energized, adjust idle speed screw to obtain specified initial idle RPM.
  2. Adjust mixture screws in (clockwise) to lean mixture to obtain final idle RPM. Reconnect and energize solenoid wire and adjust by turning solenoid plunger to obtain 850 RPM for 1-Bbl. carburetor models (1200 RPM for California 1-Bbl. models) and 1200 RPM on all 2-Bbl. carburetor applications. Reconnect distributor vacuum advance line, and fuel tank line to vapor canister. Install new limiter caps.
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