CO adjustment plug question

[sailingfc at dslextreme.com (DY Wong)]

Yeah, the removable plug was on the early CIS systems because that was how
you adjusted the CO.  As the system went electronic, the plug became metal
(i.e., permanent) so the user wouldn't make adjustments to a system that in
theory was trying to electronically self-adjust.

The only place to find those plugs now are at the junkyards and they are far
and few.

-Dick-
78 Scirocco
Original Owner
95 Passat GLX
Second Owner


-----Original Message-----
From: Karl Krupke [mailto:kkrup62@xxxxxxxxxxx] 
Sent: Monday, May 07, 2007 5:24 PM
To: jdbubb@xxxxxxxxxxx; camron@xxxxxxxxxxxxxxxxxx
Cc: scirocco-l@xxxxxxxxxxxx
Subject: Re: CO adjustment plug question


Hi List,
    The metering access hole plug wasn't always metal... early Mk1's used a 
rubber plug with a wire through the center, wire comes up vertically about 
2" and ends in a small loop. Designed to be removed for adjustment then 
replaced, much more convenient I think than the metal plugs if you're having

to diddle with mixture often for whatever reason.
    I think those old style rubber plugs got superseded in early '80's, but 
if somebody wants to dig around in ETKA you might find a number (eh... good 
luck finding the part, though).

Karl

>From: "Dan Bubb" <jdbubb@xxxxxxxxxxx>
>To: "Camron D. Crouse" <camron@xxxxxxxxxxxxxxxxxx>
>CC: scirocco-l@xxxxxxxxxxxx
>Subject: Re: CO adjustment plug question
>Date: Mon, 7 May 2007 15:23:18 -0400
>
>The hole is "outboard" of the metering plate in the sense that air flow
>through the hole still has to go past the metering plate to get into the 
>engine so all is good.
>The concern about keeping crud out is a real one though. Generally have to 
>squirt some carb cleaner down the hole at the set screw so you can insert 
>the allen wrench.
>I think the original purpose of the hole was not only to keep crud out but 
>to keep people from screwing with the setting.
>Dan
>
>From: "Camron D. Crouse" <camron@xxxxxxxxxxxxxxxxxx>
>To: "Peter" <peter@xxxxxxxxxxxxxxx>
>Cc: <scirocco-l@xxxxxxxxxxxx>
>Sent: Monday, May 07, 2007 2:59 PM
>Subject: Re: CO adjustment plug question
>
>
> >>> Hey all,
> >>>
> >>> Anyone know how to remove a partially drilled-out mixture 
> >>> adjustment plug?  I'm working on this '87 16v and the plug has 
> >>> been partially drilled out - the aluminum part.  The hardened 
> >>> steel part of the plug, well, nothing's touching that so far.  
> >>> From the diagnostics I've done at this point, this thing appears 
> >>> to be running WAY rich.
> >>>
> >>> That and I need to see if I can scare up a DPR test harness.
> >>>
> >>> Daun Yeagley - Wilmington Ohio
> >
> >>>Peter wrote:
> > > If you want to fill it in, and the stock plug won't fit, or isn't 
> > > available, I'd clean it up, and use JB Weld on it.
> > >
> > > Peter
> > >
> > >
> > >
> >
> > If this hole is left unplugged, would this constitute a vacuum leak 
> > and contribute to poor running?  Or does plugging it up merely keep 
> > the crud out?
> >
> > - Camron from Vancouver, WA USA
> >    '86.5 Black 16V 2.0L
> >
> > _______________________________________________
> > Scirocco-l mailing list
> > Scirocco-l@xxxxxxxxxxxx 
> > http://neubayern.net/mailman/listinfo/scirocco-l
> >
>
>
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