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    Thread: Can someone name this hose? New to the "Aged" VW's. 86 Cabby

    1. Member 05GTI6677's Avatar
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      2005 MK4 GTI 1.8t (rip) 86 Cabrio. 95 Jetta GL 2014 Jetta 1.8t, 2013 CC 2.0T (current)
      08-06-2012 01:39 AM #1
      Hello there, I just bought my Cabby and I am going through trying to find anomalies and I found this hose that is broken off just on the read end of the valve cover (seen below) I'm sure it's a simple question/answer so if anyone know exactly what it is please fill me in

      Photobucket

      Closer view...
      Photobucket

      Thanks!

    2. Member
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      08-06-2012 04:15 AM #2
      That's for the cis injector air shrouding. Maybe the vacuum diagram on the hood will show where it goes. Or block it off. Assuming someone didn't rig the system up incorrectly, you'll probably have a stray hose somewhere in the area.
      I really suck at smog.

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      08-06-2012 08:47 PM #3
      IIRC, that should go to the intake boot that goes over the throttle body. Should be under that boot. If you plug it make sure you close of the other side on the intake boot.

      Which reminds me I should check mine too.

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      08-07-2012 12:26 PM #4
      Those hoses are known for rotting off and causing unmeasured air leaks. I always figured that the VW engineers put them there for a reason and have always restored them. FR

    5. Member 05GTI6677's Avatar
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      08-07-2012 01:50 PM #5
      Thanks for the answers! I can't find where it went to though lol I've looked pretty good and haven't seen any stray hoses or anywhere that the hose could have went to...

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      08-07-2012 05:37 PM #6
      As someone above mentioned -- the "other" end of the hose should have connected to the air intake boot. Someone may have plugged that end or even replaced the boot. The air from the hose kept the injectors cooler and helped with atomization of the fuel. There is an "O" ring gasket under the barb on the head that will sometimes leak and cause issues. Even more likely though -- Some one could have even replaced the head along the way and "added" the connection with the new head. So it wouldn't surprise me if there was no place on the air intake boot for the hose to connect. Cabbies remained MK1s longer than Golfs, Jettas and other models. Some of the MK2 heads (like the ones found on RD engines with the CIS-E injection system) had bigger valves than MK1s so that would have been a good reason to switch to that head if a rebuilt head was needed. FR

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      08-07-2012 07:17 PM #7
      To my knowledge, VW went to air shrouded injectors starting in 84 for the last year of the other A1's. Or was that only for the gti?

      Either way, I checked the 86 cabby and it does use air shrouded injectors, so most likely it is stock.

      An HT or RD head would have been nice, but I went with a digifant head when I did the swap. No air shroud for me got some nice injector lean going on
      I really suck at smog.

    8. Member kamzcab86's Avatar
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      08-07-2012 08:07 PM #8
      Cabby-Info.com -- Your online guide to the VW Cabriolets
      Old Blue's Blog -- The adventures of a 1990 Westfalia
      "Fashion is a waste of money that could be better spent on, say, maintaining your car." ~James May

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      08-07-2012 10:00 PM #9
      I read somewhere, sometime ago that the air shroud was for idle emissions, I think it helped with fuel atomization at low engine speeds (idle). I have that port on my head and when it was on CIS, I had it plugged and left it that way when I went MS. Never had any problems passing smog test with either fuel system.
      Tradition is the art of making the same mistake repeatedly, on purpose.

    10. Member 05GTI6677's Avatar
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      08-08-2012 01:23 AM #10
      Thanks i'll double check the intake boot, but I think i'll just cap it off and see how that turns out. Could that be the reason my car is stuttering before the engine gets up to temp? I was thinking maybe the coolant temp sensor but maybe I am over thinking and should start smaller.

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      08-09-2012 07:42 PM #11
      yes, fix those vacuum leaks.

      no cts for cis lambda. you're dealing with the warmup regulator instead.
      I really suck at smog.

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