[DMCForum] Re: Setting HC / CO with a Gas Analyzer?

["content22207" <brobertson@xxxxxxxxxxxx>]

Why don't you simply unplug the frequency valve, then set CO wherever
is best for performance (European spec is 1.5% or 2%, as I recall).

Can easily plug the silly thing back in when it's time to get tested
again.

900 RPM is overall Volvo idle speed spec, BTW (F series).

Take pics tomorrow...

Bill Robertson
#5939

>--- In DMCForum@xxxxxxxxxxxxxxx, "Dave Stragand" <dave.stragand@xxxx>
wrote:
> Hi All,
>  
> Just wanted to see what all anyone has to say about setting the CO
with an
> analyzer.  We'll be doing several tomorrow at the Pittsburgh tech
session
> (possibly over 18 cars attending -- WOW!!!)
>  
> The book has you set CO to 1%, at 950 RPMs with the O2 sensor
disconnected.
> That is so that it sets CO in the middle of the range so the lambda
system
> can compensate a bit either way.
>  
> Assuming we do -not- disconnect the O2 sensor, and test at idle,
what should
> the proper setting for CO be?  Warren at DMC Houston said around 0.5
- 0.6%,
> as running it down near 0% might be a bit lean.
>  
> Pennsylvania emissions has CO 1.2% and 200 ppm HC as limits for
1981, and I
> imagine anything under 1% CO would be fine just about everywhere.  Any
> suggestions on exactly where percantage-wise that the CO should be set?
>  
> Thanks!
>  
> -Dave Stragand
> http://www.ProjectVixen.com
> VIN #05927
> 
> 
> [Non-text portions of this message have been removed]

Yahoo! Groups Sponsor

ADVERTISEMENT

---

Yahoo! Groups Links

• To visit your group on the web, go to:
  http://groups.yahoo.com/group/DMCForum/
   
• To unsubscribe from this group, send an email to:
  DMCForum-unsubscribe@xxxxxxxxxxxxxxx
   
• Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.