CO adjustment plug question

[jdbubb at verizon.net (Dan Bubb)]

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
> 
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