CIS tuning

[radek at uniserve.com]

Hello all surviving CIS fans :)

I decided to finally tackle the high idle problem in my winter ride,  
an 88 90Q.  I borrowed a wide-band O2 gauge, showing actual  
air-to-fuel ratio.  For now, I just removed the existing O2 sensor,  
replaced with the gauge's sensor and fired up the car.  First, it was  
running very rich, until it warmed up.  Once warm, the mix would be  
around 14:1 at idle, but would get very lean at higher rpms, up to 17:1.

Are these results meaningful at all, without O2 sensor connected?

The gauge has an output wire that can simulate O2 output to the ECU,  
which can be set (in low-voltage mode) to between 0 - 1 V.  According  
to Huw's page, this is the range a regular O2 sensor operates on?   
Just want to double check, wouldn't want to fry my ECU.
Thanks for any input and guidance,

Radek.