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Ford Focus

What is a vapor tube on a 2000 Ford Focus?


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2016-05-21 01:56:21
2016-05-21 01:56:21

I am assuming you mean the vapor lines in the Evaporative Management system. Trapped in the top of the fuel tank, there are fuel vapors, due to normal evaporation of the fuel. These vapors are highly combustible, and make a great fuel source for the engine, if you can figure out how to get them to the engine. That is the job of the Evap management system. At the top of the fuel tank, there is a vapor line that runs up to a management valve. At the appropriate time, usually while you are cruising along at highway speeds, the PCM decides to open that valve, and allow fuel vapors to be sucked into the intake manifold, and the engine uses these vapors. Any line in this system could be called a "vapor tube" or line.

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