CGT upshift light (switch), and smog

[auditude at cox.net]

Hi Huw,

Yeah, I bypassed it this morning, and got it smogged.  My new passing results are HC= 0.46/1.60, CO= 5.74/15.00, NOX= 1.53/2.50.

Feels good to get The Man off my back and get some maintenance done on one of the Audis at the same time.  Maybe I'll save on some of that expensive gasoline now with the fresh plugs.  My old ones were really bad!  I've been spread too thin amongst all the cars here.  But this n/a motor is only temporary, so I haven't been worried about keeping it up very much.

I will keep my eyes out for another upshift switch, not that I get to the boneyard that often.  I don't really shift when it would suggest, but I like having stuff work and it might be a good indicator of a vacuum leak if it stops working again.

Thanks for the responses!

Ken

> From: Huw Powell <audi at humanspeakers.com>
> Date: 2004/04/10 Sat PM 02:16:08 EDT
> To: auditude at cox.net
> CC: quattro at audifans.com
> Subject: Re: CGT upshift light (switch), and smog
> 
> 
> > My question now however is about the
> > stock upshift light.  Mine doesn't work, but my vacuum advance and
> > hoses are good.  I sucked on that little doohickey that is inline
> > with the hose to the vacuum advance unit and it leaks vacuum.  I'm
> > thinking it shouldn't.  I'm also wondering what it does.  My guess is
> > that it is the vacuum switch responsible for the upshift light, and
> > its leaking vacuum is the reason my light's not working.  Maybe it
> > leaks enough so that the vacuum advance doesn't work either.
> > 
> > Does anyone know if that's its function for sure, and if so, can I
> > just bypass it so that at least my vacuum advance works?
> 
> Yes, that is what it is.  You can safely ignore/remove/unplug it if you 
> want.  It shouldn't leak, of course.  Easy enough to bypass to see if it 
> makes your car run better.
> 
> The upshift light is based, as I recall, on rpm and inlet vacuum - using 
> vacuum to sense load.  There is also a tranny switch so it doesn't come 
> on in 5th.
> 
> > I suppose
> > I'd like to replace it with a good one at some point as well.  That's
> > probably a dealer-only item, right?
> 
> Probably, but it also ought to a be an easy junkyard part, if the 
> upshift light matters to you.
> 
> -- 
> Huw Powell
> 
> http://www.humanspeakers.com/audi
> 
> http://www.humanthoughts.org/
>