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Thread: Vacuum line replace?

  1. Junior Member
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    '85 MkII Rocco 16v
    04-30-2012 11:26 AM #1
    Im doing the vacuum lines on my Rocco today, but Ive been having trouble finding a thorough how-to guide on it. Anyone have a link to a 16v vac line replace thread? Thanks!

  2. Member Blaines_Rocco's Avatar
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    1986 Scirocco 16v
    04-30-2012 11:47 AM #2

  3. Junior Member
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    '85 MkII Rocco 16v
    04-30-2012 11:55 AM #3
    It does, thanks man. Do you know if the vacuum hoses 4mm, right off hand?

  4. Member BluDemon's Avatar
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    04-30-2012 12:00 PM #4
    Quote Originally Posted by SvedeBringer View Post
    It does, thanks man. Do you know if the vacuum hoses 4mm, right off hand?

    I think it's 3mm...

  5. Junior Member
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    '85 MkII Rocco 16v
    04-30-2012 12:20 PM #5
    Looks like Ill be finding out here in about 20 min, Im glad to be taking out those old cloth covered lines

  6. Member BluDemon's Avatar
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    04-30-2012 02:24 PM #6
    Quote Originally Posted by SvedeBringer View Post
    Looks like Ill be finding out here in about 20 min, Im glad to be taking out those old cloth covered lines

    I bought a roll of new cloth covered vac hose last year and just went through replacing a bunch Looks good. Just replace a piece at a time to lessen confusion on placement.

  7. Junior Member
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    '85 MkII Rocco 16v
    04-30-2012 04:09 PM #7
    Well....after using started fluid to test each line, it turns out none of my vac lines are bad, no rpm difference at all. Im having a fuel/air ratio problem right now, about 25% of the time, if Im stopped, and then start to move, my rpms will drop pretty low, the engine will sputter, and I cant move. If I apply slightly more gas with the throttle, and don't try to put it in gear, and then wait a sec, it will correct itself and return to normal rev level. I had a bad ISV, but thanks to a local forum (fatDUBS) I found a new one for free, which alleviated a great deal of idling troubles, but it still does it occasionally, like I said. Im thinking of doing a CIS-E rebuild and cleaning next, unfortunately bad gas was ran through it right before I bought it. Thoughts?

  8. Member thescirocco.com's Avatar
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    04-30-2012 04:51 PM #8
    How old is your transfer fuel pump?

    If it's a VDO pump, replace it with Pierburg.
    Discount Dealer of Techtonics and Peloquin, too low to advertise...

    Somebody stole my L9 cellphone, then changed the PIN, phone number, and right now my 302.832.8989 is on a temporary hold, my current numbers are 302.8989.051, and 302.832.2653

  9. Junior Member
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    '85 MkII Rocco 16v
    05-01-2012 01:29 AM #9
    Quote Originally Posted by thescirocco.com View Post
    How old is your transfer fuel pump?

    If it's a VDO pump, replace it with Pierburg.
    I'm not entirely certain, Id have to do a check. Its driving me crazy, though

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