The phrase might be a miscommunication or a misunderstanding. It's possible the person referring to it meant something else, perhaps one of these:
* Fuel vapor lines/hoses: These carry fuel vapors from the charcoal canister (part of the evaporative emissions system) to the intake manifold. These are hoses, not tubes in a literal sense, but could be colloquially called "vapor tubes."
* Vacuum lines: These thin tubes carry vacuum pressure used to operate various systems (like the brake booster or climate control). A damaged or disconnected vacuum line could be mistakenly called a "vapor tube" if someone's not familiar with automotive terminology.
* A misheard or misspelled term: It's possible the term was confused with another component, or simply misremembered.
To get a clear answer, you'll need to provide more context: Where did you hear this term used in relation to the 2000 Ford Focus? What was the situation? Knowing more will help identify what the person actually meant.
