O2 sensor fakeouts

[Frederic Breitwieser]

Greetings,

I haven't been keeping up with many of these threads, but I noticed that
the O2 fakeout diagrams I've seen posted here still had the O2 sensor...
are the purpose of the diagrams to "adjust" the output of the O2 sensor
on a live vehicle?  Or, are they for testing an ECM on a bench?  Because
if its the latter, you don't need the sensor obviously, and a 5 or 10
turn 100K pot and a D battery would do the trick nicely.

D cell + ---->  --\
                  /    100k 5 or 10 turn pot
                  \
                  / <------- to o2 sensor wire on ECM
                  \
                  /
D cell - --0--> --\
           |
           |
         ground



Or, have I once again missed the point?