1986 O2 sensor
Thread Starter
Intermediate
Joined: Mar 2009
Posts: 35
Likes: 0
From: Newton Ks
1986 O2 sensor
Noticed that O2 sensors are gone. After some research I found that there should be one O2 sensor on the drivers side. Is this correct?
I was also wondering why Im not getting any codes since they are gone?
I also heard that the prom chip can be reprogrammed to ignore them. If that has been done is there any way I can tell?
I was also wondering why Im not getting any codes since they are gone?
I also heard that the prom chip can be reprogrammed to ignore them. If that has been done is there any way I can tell?
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The ECM starts out in open loop mode. When the car warms up, it tries to switch to closed loop mode. If the O2 sensor is not putting out the correct voltage, the ECM falls back to closed loop mode and sets a code. You need to check for malfunction codes.
Instructor
Joined: Mar 2011
Posts: 187
Likes: 0
From: Macedon (near Rochester) NY
http://i278.photobucket.com/albums/k...8vette-174.jpg
Mine looked like this after I bought it, car never went closed, stank, just kept putting out a nearly fixed voltage somewhere in the middle of the range. Never gave me a code though, so you cant rely on those to tell you if it's bad. Need to run a scan or tap a multimeter into the line.
Gone as in broken, or gone as in somebody put a pipe plug where it should be?
Mine looked like this after I bought it, car never went closed, stank, just kept putting out a nearly fixed voltage somewhere in the middle of the range. Never gave me a code though, so you cant rely on those to tell you if it's bad. Need to run a scan or tap a multimeter into the line.
Gone as in broken, or gone as in somebody put a pipe plug where it should be?
Thread Starter
Intermediate
Joined: Mar 2009
Posts: 35
Likes: 0
From: Newton Ks
http://i278.photobucket.com/albums/k...8vette-174.jpg
Mine looked like this after I bought it, car never went closed, stank, just kept putting out a nearly fixed voltage somewhere in the middle of the range. Never gave me a code though, so you cant rely on those to tell you if it's bad. Need to run a scan or tap a multimeter into the line.
Gone as in broken, or gone as in somebody put a pipe plug where it should be?
Mine looked like this after I bought it, car never went closed, stank, just kept putting out a nearly fixed voltage somewhere in the middle of the range. Never gave me a code though, so you cant rely on those to tell you if it's bad. Need to run a scan or tap a multimeter into the line.
Gone as in broken, or gone as in somebody put a pipe plug where it should be?
Race Director
Joined: Jun 1999
Posts: 14,924
Likes: 9
From: Merritt Ils Fl
For the smart guys: A bowling buddy bought a Rustang that had all 02 sensors gone, replaced by some type of simulation device. Could that be the situation here?
Last edited by Muffin; Aug 2, 2011 at 08:46 AM.
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Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
http://www.ecklerscorvette.com/corve...1986-1991.html
