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

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

To do it properly you have to remove the plugs on the ports before the
catalytic converter. You need to make a setup like in the manual, you
need metal hoses, the heat will destroy rubber or plastic. Make sure
you plug the hole over the mixture screw and wait for the readings to
settle. Aim for the 1% CO. You have to disconnect the O2 sensor so the
Lambda will go "open mode" or you will be aiming at a "moving target"
as the Lambda fluctuates and tries to compensate for what you are doing.
David Teitelbaum
vin 10757

--- In dmcnews@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]




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