Re: Adjusting CO-mixture and idle....

[Etop Udoh <eudoh@crl.com>]

> > I'm about to install a new Oxygen Sensor in my '82 VW Scirocco, and I need
> >to know how to go about setting the correct mixture or leaning out the 
> >mixture....either one would be fine even though I prefer the later
> > - would improve my gas mileage a little bit....
> >  I have a Sears Engine Analyzer to work with and it has settings for
> > Dwell, RPMS, etc
> 
> My favorite is to attach one end of the dwell meter to the connector with
> the blue wire leading into it near the master cylinder(O2 test connector),
> and the other to ground or the negative terminal of the battery.
> 
> Set the dwell to 80 and 4cyl. Then make sure the engine is warm enough that
> the O2 sensor is operating(let the fan cycle once). Now Turn the 3mm hex
> clockwise for richer and counterclock for leaner. On the dwell meter, you
> should be aiming for a reading of 40. This will allow for the O2 sensor to
> operate in a range where it will not have to make much of a correction.
> 
> Why do you have to lean out the mixture with a new O2 sensor? Is the car
> without a cat? Don't bother to answer that if yes. If it has one, then you
> should have no problem passing if the car is tuned. Good luck!
> 
 I just had a cat put on it since it didn't have one initially....
 As far as looking for a leaner mixture, I was looking for some method of
 Improving my gas mileage unless someone can suggest other methods if there
 are any...

 '82 VW Scirocco, 1.7L....

> Any quibbles with the method, please add.
> 
> Regards,
> Paul Hanley
> 
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 |      Etop Udoh          | Southern Polytechnic State University [89-##] |
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