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Hot Idle Compensation System: Description

The Hot Idle Compensation System supplies additional air to intake manifold under hot idle conditions to maintain smooth idle and reduce emissions. A bi-metal valve in air cleaner opens passage from air cleaner to intake manifold. When this happens, fresh air mixes with rich air/fuel mixture (caused by sustained idle) and creates better combustion. Valve opens between 145-160°F (63-71°C).