o2 unplugged-Still running good.
08-09-2006, 12:52 AM
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o2 unplugged-Still running good. I installed a cam a couple weeks back and while I was under the car I noticed my driver side o2 sensor was unplugged. I must have drove the car for about a month with it unplugged and never noticed. The car has headers with o2 sims for the rear o2's. When the car was on the ground and I looked under it I thought the loose wires that were hanging down must have been one of my rear o2 sims. It turns out something must have snagged the o2 extension for the driver side front o2 and pulled the connector loose from behind the alt.
I've read many posts where people talked about how bad their car was running because of a bad o2 so that got me to wondering how mine seems to run just fine without the driver side o2. The only thing I can think of is maybe the computer can tell that there is an open in the o2 circuit and stays in open loop, or maybe it uses the readings from the passenger side for both? Is it possable the sensor had been damaged from not being hooked up for so long?
I've read many posts where people talked about how bad their car was running because of a bad o2 so that got me to wondering how mine seems to run just fine without the driver side o2. The only thing I can think of is maybe the computer can tell that there is an open in the o2 circuit and stays in open loop, or maybe it uses the readings from the passenger side for both? Is it possable the sensor had been damaged from not being hooked up for so long?
08-09-2006, 01:55 AM
#2
Did you ever get a tune that may have compensated for the O2's? Usually the car will run rich if the o2's are bad or even if one goes. I doubt that leaving it unplugged caused it any damage...but exposure to the elements like rain may have hurt it. If you got a tune that may have compensated for the front o2's.
08-09-2006, 05:59 AM
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Nope, it has never had a tune. It may be running a little rich but nothing like I would have expected from reading the problems others have had with bad o2's.
08-09-2006, 10:08 AM
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Open loop does not necessarily run badly. Look
at all those crappy 4BBL carbureted late-'60s
cars. Not a transistor in 'em outside of the radio
(which had about 6). Still they ran consistently
and the only downside really, was the smell (an
acquired taste, mostly-burnt high octane with a
little lead on the side).
If your tune is good then closed loop is just a
layer of meddling that can be more bother than
help (especially if you have no cats, which are
the only thing that really cares about chemical
balance).
Bad O2s ignored, != bad O2s believed good.
The latter being the root of much evil.
at all those crappy 4BBL carbureted late-'60s
cars. Not a transistor in 'em outside of the radio
(which had about 6). Still they ran consistently
and the only downside really, was the smell (an
acquired taste, mostly-burnt high octane with a
little lead on the side).
If your tune is good then closed loop is just a
layer of meddling that can be more bother than
help (especially if you have no cats, which are
the only thing that really cares about chemical
balance).
Bad O2s ignored, != bad O2s believed good.
The latter being the root of much evil.
