Notices
ECU Flash

how-to: control closed loop AFR with your wideband O2 system

Thread Tools
 
Search this Thread
 
Old May 23, 2010 | 01:23 AM
  #271  
3gEclipseTurbo's Avatar
Evolved Member
iTrader: (12)
 
Joined: Aug 2009
Posts: 1,589
Likes: 0
From: ma
I might have wired the analog to the front o2 instead of the rear.....Ill check later today.
Reply
Old May 23, 2010 | 08:45 AM
  #272  
VGergo's Avatar
Evolved Member
20 Year Member
iTrader: (3)
 
Joined: Nov 2005
Posts: 566
Likes: 1
From: Hungary
Originally Posted by knochgoon24
The turning off the "allow closed loop" setting does go off the fuel map all the time, but it won't use the fuel trims to target the value. This patch will use the fuel trims to help hit your target. This keeps you from having to tune those low load/low rpm values that can sometimes be a pain to get exact. The fuel trims will help you get the best fuel mileage and performance by always trying to hit the values in the map.
okay i see thank you ! just wondering what will happen if the wbo2 go wrong or not enough hot on a cold winter morning ?!
Which Bosc wideband o2 sensor is recommended ? Is it enough to buy only the wbo2 sensor to wire it to the ecu ?
Reply
Old May 23, 2010 | 10:10 AM
  #273  
acidikjuice's Avatar
Newbie
 
Joined: Apr 2009
Posts: 30
Likes: 0
From: Blacksburg Va (VT)
Talking

If the sensor goes bad your trims will go way out of line. These sensors, when they fail, will read out a lean voltage (normally) and the car will enrich until the fuel trim maxes out. You will see lots of black smoke from all the extra rich condition and your gas tank will empty fast!

With the stock 02 sensor you will get a check engine light, with WB02, you will not. However, hopefully you have your WB02 output displayed on a gauge or screen and you will notice that it is failing and replace it.

When it is very cold, the sensor will take more time to warm up. Just keep the car in open loop longer using settings in your rom. If it is very cold, you might have issues with some sensors.

I just did some more driving and the mod works well. If your injector scaling or latency are not dialed in, you will notice it right away. The closed loop tends to sweep more in the direction your un-tuned in. That is, if you trims where negative before applying the mod, your going to swing more to the rich side. If you trims were lean before hand, your going to swing a bit more to the lean side. This actually helped me dial in my tune at part throttle a little better.

Only time will tell if it will save me some fuel! Results later this week!
Reply
Old May 23, 2010 | 05:56 PM
  #274  
3gEclipseTurbo's Avatar
Evolved Member
iTrader: (12)
 
Joined: Aug 2009
Posts: 1,589
Likes: 0
From: ma
Originally Posted by acidikjuice
I have implemented the 9653 port and it seems to work well. The 'sluggish' response of the system is indeed noticeable, but my WB02 is located in the stock rear 02 location, so this about what I expected.

I have not made any adjustments to the fuel map, so I will report back if I have success leaning out my cruise cells and 'saving' some fuel.

3gTurbo: the front 02 should report .8 volts, that is what looks normal to me. I have my WB02 setup in the rear 02 as per the instructions found in other threads (I believe post 1 from mrfred actually cites them).

I am running this on my 2G Eclipse, I'm not sure what your doing wrong but heres what I did:

-Reset ECU
-modified my XML with logics code
-Load up my V7 9653 rom with ecuflash 1.42
-copied all the required code from logic's rom he posted
-Set warmup AFR to 14.3, enabled the patch, and double checked that the MUT table was correct.
-loaded rom into ecu and started! no problems.

I would assume it is an issue with your calculations or you have incorrectly applied the patch. everything works for me, just a bit sluggish, BUT I do like it!

Great job to mrfred for making the patch, everyone appreciates your time and effort! A big thanks to Logic for the port!
You said you enabled the patch. You have to enable it? Dont you just patch the rom and copy all the stuff over from the rom you download?
Reply
Old May 23, 2010 | 06:16 PM
  #275  
3gEclipseTurbo's Avatar
Evolved Member
iTrader: (12)
 
Joined: Aug 2009
Posts: 1,589
Likes: 0
From: ma
I did have the wideband wired to the front o2 so i rewired it to the rear o2 sensor pin. I logged it with my 0008 rom and it is logging the wideband as the rear o2. But when i swap to the 9653 rom it doesnt log, the front o2 and rear o2 just stay the same.

Logic or MrFredd is there anyway you can change the addresses so i can use the patch on a 9417 rom? PLEASE!!!!!!
Reply
Old May 24, 2010 | 08:30 PM
  #276  
acidikjuice's Avatar
Newbie
 
Joined: Apr 2009
Posts: 30
Likes: 0
From: Blacksburg Va (VT)
When using the 9653 rom, have you properly setup your MUT table to read the values correctly? Have you setup evoscan correctly? Chances are if you can't get it to work with 9653, your not going to have much luck with another rom. It works and it is very easy.

First things first: Forget the patch. go back to a normal 9653 rom (V7) and get the WB02 working correctly. Follow the threads about this and get evoscan logging your WB02, while the car is running off the front narrow band.

It really sounds like your having issues trying to mod two things at once. Once you get the WB02 logging correctly with 9653, applying the patch is a 5 minuet process, heck not even that long.

and...

Yes you have to enable the patch: see the following pic: the first box to the left under the MUT has a one to enable closed loop WB logging.

Attached Thumbnails how-to: control closed loop AFR with your wideband O2 system-help_pic.jpg  
Reply
Old May 25, 2010 | 11:23 AM
  #277  
VGergo's Avatar
Evolved Member
20 Year Member
iTrader: (3)
 
Joined: Nov 2005
Posts: 566
Likes: 1
From: Hungary
acidikjuice :

okay thank you ! but which wbo2 do you suggest ? Do I need a complete setup with analog and serial output cable or enough only the sensor for ~ 80$ ?
Reply
Old May 25, 2010 | 01:17 PM
  #278  
logic's Avatar
Evolved Member
iTrader: (2)
 
Joined: Apr 2003
Posts: 1,022
Likes: 7
From: Berkeley, CA
3gEclipseTurbo: see acid's post. It sounds to me like you don't have logging for your wideband O2 set up correctly for 9653. I'm afraid I don't really have a whole lot of time to do another port of this, so someone else would have to take that on if they really wanted it.

VGergo: You need a real wideband O2 kit, such as an LC-1, ZT-2, or UEGO. The controller does considerably more than just put out an analog signal: it handles sensor warm-up and power regulation, calibration, and produces a clean, linear output.
Reply
Old May 25, 2010 | 04:38 PM
  #279  
VGergo's Avatar
Evolved Member
20 Year Member
iTrader: (3)
 
Joined: Nov 2005
Posts: 566
Likes: 1
From: Hungary
Logic : okay thank you than lets buy one.
Reply
Old May 25, 2010 | 05:46 PM
  #280  
3gEclipseTurbo's Avatar
Evolved Member
iTrader: (12)
 
Joined: Aug 2009
Posts: 1,589
Likes: 0
From: ma
I did all that....

Originally Posted by acidikjuice
When using the 9653 rom, have you properly setup your MUT table to read the values correctly? Have you setup evoscan correctly? Chances are if you can't get it to work with 9653, your not going to have much luck with another rom. It works and it is very easy.

First things first: Forget the patch. go back to a normal 9653 rom (V7) and get the WB02 working correctly. Follow the threads about this and get evoscan logging your WB02, while the car is running off the front narrow band.

It really sounds like your having issues trying to mod two things at once. Once you get the WB02 logging correctly with 9653, applying the patch is a 5 minuet process, heck not even that long.

and...

Yes you have to enable the patch: see the following pic: the first box to the left under the MUT has a one to enable closed loop WB logging.

Reply
Old May 31, 2010 | 02:24 AM
  #281  
VGergo's Avatar
Evolved Member
20 Year Member
iTrader: (3)
 
Joined: Nov 2005
Posts: 566
Likes: 1
From: Hungary
Coud we use the LC-1 Wideband Controller to control the closed loop afr ? No random reseting like travman said at the begining of the topic ? I would place the sensor @ bend of the dp.
Reply
Old Jun 2, 2010 | 08:40 AM
  #282  
VGergo's Avatar
Evolved Member
20 Year Member
iTrader: (3)
 
Joined: Nov 2005
Posts: 566
Likes: 1
From: Hungary
Anyone here ?? Which wideband shoud I buy for the controling the closed loop AFR a simple cheap LC1 is engoug or go with AEM or Zeitronix only ?! I would buy a reliable solution to control my cruise afr.
Reply
Old Jun 2, 2010 | 09:00 AM
  #283  
travman's Avatar
Evolved Member
iTrader: (26)
 
Joined: Oct 2005
Posts: 1,712
Likes: 0
From: Pittsburgh
Originally Posted by VGergo
Anyone here ?? Which wideband shoud I buy for the controling the closed loop AFR a simple cheap LC1 is engoug or go with AEM or Zeitronix only ?! I would buy a reliable solution to control my cruise afr.
I would highly recommend the ZT2......LC-1 has always been hit/miss - for every good review there is a bad one, I had a bad experience and 2 years ago went to zeitronix and never looked back.

If you have a trouble free LC-1 then it will work great.......
Reply
Old Jun 2, 2010 | 09:46 AM
  #284  
VGergo's Avatar
Evolved Member
20 Year Member
iTrader: (3)
 
Joined: Nov 2005
Posts: 566
Likes: 1
From: Hungary
Originally Posted by travman
I would highly recommend the ZT2......LC-1 has always been hit/miss - for every good review there is a bad one, I had a bad experience and 2 years ago went to zeitronix and never looked back.

If you have a trouble free LC-1 then it will work great.......

I see, thank you just the ZT2 has many other function what i dont need but if it is the only one which can work everyday.. Maybe someone with AEM Uego ?
Reply
Old Jun 13, 2010 | 03:50 PM
  #285  
zoek24's Avatar
Newbie
15 Year Member
 
Joined: Oct 2008
Posts: 57
Likes: 0
From: SLC
Powerdex AFX

I have been using the Powerdex AFX wideband to log A/F Through the rear O2 for a few months now. I would like to use it with this patch as well. Can any body tell me what adjustments I would have to make to use this wideband?
Reply



All times are GMT -7. The time now is 11:13 PM.