Chevrolet Cobalt Service & Repair Manual: Emission Controls

Engine Management

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General Motors Co.

FIG. NO. BUICK: EVAP System & Canister: Centu ...

See also:

Chevrolet Cobalt Service & Repair Manual. Compression Pressures
1. Ensure engine is at room temperature and battery is fully charged. 2. Disconnect wiring from ignition module and remove spark plugs. 3. Throttle body valve should be wide open. ...