Little green cap?

Discussion in '1998 - 2011 Ford Ranger' started by 06FordFX4, May 26, 2013.

  1. 06FordFX4

    06FordFX4 Canadian Redneck

    What is this thing? It was unscrewed so I screwed it on. What's it do? And is it sposed to be on or off? Been off since I got the truck, just figured I'd screw it on.

    Any thoughts?
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  3. fomoco

    fomoco Moderator

    a pic would be nice
  4. Diablo

    Diablo New Member

    it keeps the little green things in
  5. OP

    06FordFX4 Canadian Redneck

    ah ****. damn tapatalk has been ****ting the bed lately with pictures.
    hang tight
  6. OP

    06FordFX4 Canadian Redneck

    here ya go.

  7. fomoco

    fomoco Moderator

    that's to turn on the nawsssss!!!!.... I've never noticed it on my truck
  8. klinger86

    klinger86 Moderator

    Looks to me like its a dust cap. Leave it on or take it off I don't think it will hurt anything.
  9. djfllmn

    djfllmn ^^^ I am Mr. Clean!

    that looks like a vac. test port
  10. rwenzing

    rwenzing Bob

    The green cap covers the port used to check the fuel tank and evaporative emission system for leaks. Keep it on.

  11. OP

    06FordFX4 Canadian Redneck

    Interesting. Good to know. Wonder why it was off....

    Been off for at least 30,000 miles haha. It's on now though.
  12. rwenzing

    rwenzing Bob

    On most vehicles, that port would rarely or never be used. Normally, the cap would be removed only as necessary to leak-test the evap system by injecting smoke into it. The usual reason to suspect a leak is a CEL and corresponding trouble code.
  13. OP

    06FordFX4 Canadian Redneck

    Thanks for the info sir.
  14. Belvader

    Belvader New Member

    I vote it keeps all of the rainbows and pretty unicorns and cupcakes stuck inside... but that's just me

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