Modifying O2 output

[ARTHUR OKUN]

You wrote: 
>
>CICIORA STEVEN JOSEP writes:
>> 
>>   Anyway... if the above two situations are the case for you, than a 

>> voltage divider wont work.  I know you said not to ask, but what are 
you 
>> trying to do?  I've thought about what you mention, and I'm not sure 
you 
>> can fool the computer into thinking that it is a little bit leaner 
than 
>> it really is.  From what little bit of looking I've done at the 
output of 
>> O2 sensors, it is usually much above .6 (.7?) volts (like 1 volt) or 
much 
>> below (like .2 volts).  Almost like a switch.
>
>I don't know exactly how our electronics guy built the circuit,
>but I did use a circuit that shifted EGO output by almost 1V
>(adjustable).  This let me run closed loop around about 600mv,
>which was about 0.90-0.94 lambda with the EGO's I was using.  It 
worked
>great for what I was doing,  but i did go through about 6 oxygen 
sensors
>before I found a pair that behaved like I wanted, and had a hard time
>convincing my presentation judge at NGV Challenge '93 that it really
>worked.
>
>-- 
>Jonathan R. Lusky                        lusky at knuth.mtsu.edu
>http://www.edge.net/~lusky/                 (615) 726-8700
>-------------------------------------   ------------------------------
>68 Camaro Convertible - 350 / TH350  \_/ 80 Toyota Celica - 20R / 5spd
>
I BELIVE THE ECU  WILL AUTOCALIBRATE TO COMPENSATE FOR THE REDUCED
VOLTAGE OUTPUT   BELOW A CERTAIN LEVEL YOU WILL GET AN ERROR CODE.