DIY rear o2 simulators
Team Owner
Joined: Aug 2003
Posts: 24,333
Likes: 1
From: VA
St. Jude Donor '03-'11
Originally Posted by cjs27410
Does anyone know which ohm resistor to use?
In the old days, you could fake it with a 555 timer and some minimal circuits, but with OBD-II, there are alot of checks for frequency of oscillation, etc...
Melting Slicks
Joined: Oct 2002
Posts: 2,200
Likes: 0
Originally Posted by cjs27410
I think:
The rear o2 sensors only signal that the cats are installed.
The front o2 sensors regulate the lean & rich mixture.
The rear o2 sensors only signal that the cats are installed.
The front o2 sensors regulate the lean & rich mixture.
Drifting
Joined: Oct 2003
Posts: 1,540
Likes: 0
From: bloomfield nj
partially correct.rear o2's measure cat efficiency.they tell the ecm how well the cats are operating,but the voltages do change[they don't fluctuate like the fronts,but will cycle between .3-.6 millivolts]
