Power FC Can someone explain to me what the "O2 Feedback control" function is/does?
#1
Rotary Freak
Thread Starter
Can someone explain to me what the "O2 Feedback control" function is/does?
I have been experimenting with it on and off and I have noticed that with it off, it causes my idle to hunt a bit before settling down and smotting out, it also minimizes the backfiring(which is what I'm trying to fix)
So what is this thing for?
So what is this thing for?
#2
Lives on the Forum
Join Date: Dec 2001
Location: San Lorenzo, California
Posts: 14,716
Likes: 0
Received 8 Likes
on
8 Posts
John,
The O2 feedback is just the standard O2 closed-loop process for cruising conditions. Turning it on and off shouldn't affect your idle at all. I've been running with mine off for a little while as an experiment.
Your O2 sensor is probably bad.
The O2 feedback is just the standard O2 closed-loop process for cruising conditions. Turning it on and off shouldn't affect your idle at all. I've been running with mine off for a little while as an experiment.
Your O2 sensor is probably bad.
#4
Hooray For Boobies!!!
not sure, but I though it was to try to purify the exhaust gases as best as possible.
I would think it would only work on cruise (anything besides WOT).
When I switch mine from ON to OFF, nothing happens. I may build up more carbon deposits on the rear bumper with it off, but I can't tell (car runs way too rich)
Sounds like your O2 sensor may be bad, like stated abvoe.
Goto the sensor check screen (etc.) and watch the O2 voltage.
I would think it would only work on cruise (anything besides WOT).
When I switch mine from ON to OFF, nothing happens. I may build up more carbon deposits on the rear bumper with it off, but I can't tell (car runs way too rich)
Sounds like your O2 sensor may be bad, like stated abvoe.
Goto the sensor check screen (etc.) and watch the O2 voltage.
#5
Yellow Dragon is no more
Well lets talk about a few things here. One, do you have an air pump or ACV on the car? Two, O2 feedback that I was talking about was the following. I don't believe the setting on the PFC affects closed loop at cruise. I don't really have any proof of this, it is a feeling. I have leaned out my fuel map and got better fuel economy by doing that then with this setting either on or off, seq/non/single .... so ever!
Now back to point number one. I don't have an ACV and if I turn that setting on my car idles funny.
Now back to point number one. I don't have an ACV and if I turn that setting on my car idles funny.
#7
Need more sleep
iTrader: (1)
spyfish,
O2 feedback is for lean cruise. If you own a narrowband AFR sensor you will see this clearly. During cruise the AFR will bounce from rich to lean as the O2 feedback works. Turn it off and your cruise AFR will be rock steady.
I turned mine off long ago because it would go into closed loop at very low speeds and even idle. It would buck at low speeds as the motor leaned out and it would sometimes stall at stops.
O2 feedback is for lean cruise. If you own a narrowband AFR sensor you will see this clearly. During cruise the AFR will bounce from rich to lean as the O2 feedback works. Turn it off and your cruise AFR will be rock steady.
I turned mine off long ago because it would go into closed loop at very low speeds and even idle. It would buck at low speeds as the motor leaned out and it would sometimes stall at stops.
Trending Topics
#8
Rotary Freak
Thread Starter
Originally posted by twokrx7
spyfish,
O2 feedback is for lean cruise. If you own a narrowband AFR sensor you will see this clearly. During cruise the AFR will bounce from rich to lean as the O2 feedback works. Turn it off and your cruise AFR will be rock steady.
I turned mine off long ago because it would go into closed loop at very low speeds and even idle. It would buck at low speeds as the motor leaned out and it would sometimes stall at stops.
spyfish,
O2 feedback is for lean cruise. If you own a narrowband AFR sensor you will see this clearly. During cruise the AFR will bounce from rich to lean as the O2 feedback works. Turn it off and your cruise AFR will be rock steady.
I turned mine off long ago because it would go into closed loop at very low speeds and even idle. It would buck at low speeds as the motor leaned out and it would sometimes stall at stops.
I'm wondering if my O2 sensor is bad or if I just need to let my PFC "re-learn" my idle by doing the ALL DATA Init...
What do you guys think? Do all FD's with mid pipes backfire?
#10
Rotary Freak
Thread Starter
Originally posted by x605p747R1
If your O2 sensor is bad, the sensor check screen will show it to you.
If your O2 sensor is bad, the sensor check screen will show it to you.
Ok, I have the following things with black indicator dots next to them(I guess that means that these sensors are bad):
NTR
FPD
APR CCN
Now what?
Last edited by jpandes; 04-23-04 at 05:12 PM.
#11
Hooray For Boobies!!!
Look at the PFC manual in the stick at the start of the PFC forum. In there it will tell you what those mean. I thin NTR stands for Neutral. When the light is by it it means active/on.
So you were in neutral, right?
FPD may be fuel pump, do quote me on that. That should be on if the key is "on" or the car is running.
The others I can't remember right now. I can look them up, but you should probably read the manual.
The on you need to look at for your o2 sensor will be, 02S and it will have a viltage by it when the car is running and the 02 sensor has had a chance to warm up. If it reads zero with and I think a black dot that means its bad. Check the manual in the sticky.
So you were in neutral, right?
FPD may be fuel pump, do quote me on that. That should be on if the key is "on" or the car is running.
The others I can't remember right now. I can look them up, but you should probably read the manual.
The on you need to look at for your o2 sensor will be, 02S and it will have a viltage by it when the car is running and the 02 sensor has had a chance to warm up. If it reads zero with and I think a black dot that means its bad. Check the manual in the sticky.
#12
Hooray For Boobies!!!
Don't mind all the typos. I looked at mine again and the 02 sensor just has avoltage by it, no black or clear dot. I guess if it reads zero all the time it is bad. But I am not sure, I have never had mine fail on me yet.
#13
block-spike
Join Date: Feb 2004
Location: West Chester, PA
Posts: 548
Likes: 0
Received 0 Likes
on
0 Posts
see rynbergs post for 100% correctnes....
that being said I turned mine off and have tuned the few cells that it was affecting....p4-p6 between n5 and n10 to run right around stoich because mine was causing my car to surge and I could watch the injector duty cycling between 12 and 16. Now it is smooth and allows much more refinement in the cells I mentioned.
Bob
that being said I turned mine off and have tuned the few cells that it was affecting....p4-p6 between n5 and n10 to run right around stoich because mine was causing my car to surge and I could watch the injector duty cycling between 12 and 16. Now it is smooth and allows much more refinement in the cells I mentioned.
Bob
#21
Temple of Cornd0g
Last night I rode in a CYM with the impressive PLX M-series WBO2 gauge mounted in steering column pod; it performed superbly with excellent AFR range [incredible richness in low 10's as PFC needs serious retuning].
I shall ascertain the two customer AEM WBO2's [Reinhart Marauder and LS1 FD] get powered with clean signals and grounds and report those findings.
I shall ascertain the two customer AEM WBO2's [Reinhart Marauder and LS1 FD] get powered with clean signals and grounds and report those findings.