Re: Second O2 sensor guestion

[JTesta1966@aol.com]

In a message dated 4/5/00 12:35:28 PM Eastern Daylight Time, 
nacelp@bright.net writes:

<< Anyone know how to generate a second O2 sensor feedback signal for a OBD II
 PCM?.   Seems like all it would take is a voltage divider.
 Thanks
 Grumpy >>

Just remember, if you're doing this for hollow cat(s) you need to reduce, or 
flatline the 2nd sensors output. You really should capture a "signature" 
waveform and duplicate it. There should be very little coming out of the 
catalyst by way of O2. First O2 might be like /\/\/\/\/\ where 2nd might be 
^^^^^^^...ok, bad drawing, but I think you get the idea.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jim Testa                                            TType86 on #BuickGN
jtesta1966@aol.com                               buick.fiendish.net:6667
ASE Master Technician              NJ Lic. Motor Vehicle Inspector
L1 Adv Eng Perf Certified       NJ Licensed Emissions repair Tech
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