When starting a cold engine, the gate valve is open allowing air from the air cleaner to bypass the throttle valve and flow directly through the air valve to the air intake chamber. Thus, eventhough the throttle valve is in the closed position, intake air volume is increased and idle speed will be slightly faster than normal (fast idle). When the engine is started, current begins to flow ro the heat coil. As the bimetal is healed, the gate valve will gradually close and engine rpm will decrease.

Once warmed up, the gate valve will be fully closed, preventing air flow, and idle speed will return to normal.

Simple Car Care Tips and Advice

Simple Car Care Tips and Advice

Put an End to All Your Car Troubles. Does Your Car Break Down Often? Are You Spending More On Fuel Than You Thought You Would? Is Maintaining Your Car Eating Into Your Budget? Make Your Car Last Longer with Some Simple Do It Yourself Tips.

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