Why so many O2 sensors?
Safety Car
Joined: Feb 2002
Posts: 4,942
Likes: 7
From: Gaffney, S.C.
Re: Why so many O2 sensors? (split63)
The right and left bank front sensors adjust the fuel mixture while the right and left post converter sensors monitor the catalyst efficiency and make no fuel adjustments.
Racer
Joined: Jan 2001
Posts: 457
Likes: 0
From: Stockbridge GA
Re: Why so many O2 sensors? (split63)
1st set of sensors is in the header to monitor mixture, 2nd set of sensors is after the cats to measure their efficiency.
If they are removed you'll probably need 02 senor simulators, else you'll throw ODB II codes which would mean not emissions sticker.
If they are removed you'll probably need 02 senor simulators, else you'll throw ODB II codes which would mean not emissions sticker.
Safety Car
Joined: Dec 2002
Posts: 4,010
Likes: 1
From: SE Idaho
St. Jude Contributor
Re: Why so many O2 sensors? (Bugster57)
OBD II requirement to signal the driver, via the SES light, that a catalyst(s) is not functioning properly. In the olden days, prior to OBD II, the Cat(s) could be failing to clean the air, and the customer would never know.
Thread Starter
Pro
Joined: Mar 2003
Posts: 629
Likes: 20
From: Texas
Re: Why so many O2 sensors? (Bugster57)
How does it measure the efficiency? Its essentially getting the same exhaust gases as the first sensor. How far are they apart? Oh, its after the Cats, I see.
The 2002 vette motor in question is going in a '63 vette, so no worries about emissions. While it will not have the emissions of a 2002 vette with a cat, it will be much better than the stock carburated engine's emissions.
Well it should be easy enough to simulate the O2 sensor as I can just wire it in the center of the O2's range.
Thanks,
[Modified by split63, 7:17 PM 8/4/2003]
[Modified by split63, 7:19 PM 8/4/2003]
The 2002 vette motor in question is going in a '63 vette, so no worries about emissions. While it will not have the emissions of a 2002 vette with a cat, it will be much better than the stock carburated engine's emissions.
Well it should be easy enough to simulate the O2 sensor as I can just wire it in the center of the O2's range.
Thanks,
[Modified by split63, 7:17 PM 8/4/2003]
[Modified by split63, 7:19 PM 8/4/2003]
