So a throttle is used to regulate the power to the engine by increasing or decreasing the flow of fuel. A HP cock is used to block fuel flow. Both of these things operate based on a turning mechanism that either lets the fuel flow or blocks it. So what is the difference between the two? Do they not just do the same thing?
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A throttle does not control the flow of fuel. The throttle increase the flow of **air** and then the sensors/computer in the car calculate how much fuel is required to make the proper air/fuel ratio.
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