E90Post
 


Lux Angel Eyes
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Factory Wideband Readings



Reply
 
Thread Tools Search this Thread
      06-14-2007, 07:28 PM   #1
Terry335
Banned
 
Drives: 335i
Join Date: Jan 2007
Location: Socal

Posts: 2,587
iTrader: (0)

Factory Wideband Readings

Has anyone else scanned the factory wideband sensors? I’m getting some wacky readings on mine and I’m not yet sure if they’re a byproduct of my scanning software, or accurate readings.

Just guessing based on what my scanning software says (I have not actually put a meter on the sensor yet, I guess that will be the next step):

1) It’s a current based sensor, with a range of -3 to 3 ma
2) 0ma seems to equate to around stoch (~14.7:1)
2) -.37ma seems to equate to around 13.5:1
3) -.65ma seems to equate to around 12.5:1

So to richen the mixture up under boost a full point, I’m guessing we need to figure out how to pull an additional .35ma from the ECU. I’m thinking its as simple as a ~40k resistor to ground on each o2 wire (assuming its 12v). Who wants to lend me a wideband for testing?

Last edited by Terry335; 06-14-2007 at 10:59 PM.
Terry335 is offline   United_States
0
Reply With Quote
      06-15-2007, 12:26 AM   #2
CASHBY
 
Drives: E90 335 "done up"
Join Date: Dec 2006
Location: GARAGE

Posts: 2,117
iTrader: (2)

Terry, this reading is off your OBD2 Tool and new program you have?

I know stock we run pretty lean but not sure its that high. It would be nice to get an acutal wideband hooked up on the car to see the readings.

I really dont even trust sniffers that used on the dyno.
CASHBY is offline   United_States
0
Reply With Quote
      06-15-2007, 01:58 AM   #3
Terry335
Banned
 
Drives: 335i
Join Date: Jan 2007
Location: Socal

Posts: 2,587
iTrader: (0)

Quote:
Originally Posted by CEA 3 View Post
Terry, this reading is off your OBD2 Tool and new program you have?

I know stock we run pretty lean but not sure its that high. It would be nice to get an acutal wideband hooked up on the car to see the readings.

I really dont even trust sniffers that used on the dyno.
Yeah, I sent it back for a reflash from the manafac and the o2 values work now. I found a few cheap wideband setups on eBay, I'll probably get one of those for testing and sell it when I'm done. I can just throw it in the secondary o2 sensor bung on a temp basis.
Terry335 is offline   United_States
0
Reply With Quote
      06-15-2007, 11:03 AM   #4
Terry335
Banned
 
Drives: 335i
Join Date: Jan 2007
Location: Socal

Posts: 2,587
iTrader: (0)

No one else has scanned their cars?? That would be scary!
Terry335 is offline   United_States
0
Reply With Quote
      06-15-2007, 11:05 AM   #5
CASHBY
 
Drives: E90 335 "done up"
Join Date: Dec 2006
Location: GARAGE

Posts: 2,117
iTrader: (2)

Quote:
Originally Posted by Terry335 View Post
No one else has scanned their cars?? That would be scary!
with that program that you showed me can you logg it?
CASHBY is offline   United_States
0
Reply With Quote
      06-15-2007, 11:08 AM   #6
Terry335
Banned
 
Drives: 335i
Join Date: Jan 2007
Location: Socal

Posts: 2,587
iTrader: (0)

Quote:
Originally Posted by CEA 3 View Post
with that program that you showed me can you logg it?
That one won't do O2 sensors or ignition advance. The only one I found to do it was Autella-Dynoscan, but it also is limited (slow refresh rates, etc).
Terry335 is offline   United_States
0
Reply With Quote
      06-15-2007, 11:18 AM   #7
CASHBY
 
Drives: E90 335 "done up"
Join Date: Dec 2006
Location: GARAGE

Posts: 2,117
iTrader: (2)

Yea I figured, how about EGTs or IAT with this program? I havnt even got a chance to mess around with this yet.. But on my Audi's I have VAGCOM which basicly allows me to logg everything except wideband readings as well. i did some comparesents with that for the IC and showed the differences in IAT with a better IC.

in regards to the post over on that other thread, I was thinking about doing a comparesent with having an intercooler sprayer on the 335
CASHBY is offline   United_States
0
Reply With Quote
      06-15-2007, 11:19 AM   #8
Terry335
Banned
 
Drives: 335i
Join Date: Jan 2007
Location: Socal

Posts: 2,587
iTrader: (0)

Quote:
Originally Posted by CEA 3 View Post
Yea I figured, how about EGTs or IAT with this program?

in regards to the post over on that other thread, I was thinking about doing a comparesent with having an intercooler sprayer.
I don't think we have EGT sensors from the factory, but I didn't try IAT.
Terry335 is offline   United_States
0
Reply With Quote
      06-15-2007, 11:24 AM   #9
CASHBY
 
Drives: E90 335 "done up"
Join Date: Dec 2006
Location: GARAGE

Posts: 2,117
iTrader: (2)

Quote:
Originally Posted by Terry335 View Post
I don't think we have EGT sensors from the factory, but I didn't try IAT.
Yea, I think your right... I will see if we can log IAT.
CASHBY is offline   United_States
0
Reply With Quote
      06-15-2007, 05:01 PM   #10
Terry335
Banned
 
Drives: 335i
Join Date: Jan 2007
Location: Socal

Posts: 2,587
iTrader: (0)

I ordered one of these to screw around with my o2 sensors:

http://cgi.ebay.com/ebaymotors/ws/eB...m=190120834161

It's around $325 shipped, and can be moved from car to car pretty easily. I've always wanted one in the toolbox for tuning.
Terry335 is offline   United_States
0
Reply With Quote
      06-15-2007, 05:11 PM   #11
CASHBY
 
Drives: E90 335 "done up"
Join Date: Dec 2006
Location: GARAGE

Posts: 2,117
iTrader: (2)

Nice....always handy.
CASHBY is offline   United_States
0
Reply With Quote
      06-15-2007, 05:52 PM   #12
danielg
Lieutenant
 
Drives: 07 335i sedan
Join Date: May 2007
Location: Bay Area, CA

Posts: 528
iTrader: (0)

Where can I sign up for the Terry e90 email list?

signed,

One of your fans.
danielg is offline  
0
Reply With Quote
      06-15-2007, 06:32 PM   #13
A418t81
Major
 
Drives: F80 M3/997TT
Join Date: May 2007
Location: Birmingham Al

Posts: 1,306
iTrader: (1)

Garage List
Quote:
Originally Posted by Terry335 View Post
I ordered one of these to screw around with my o2 sensors:

http://cgi.ebay.com/ebaymotors/ws/eB...m=190120834161

It's around $325 shipped, and can be moved from car to car pretty easily. I've always wanted one in the toolbox for tuning.
Cool. I have an LC1 that I converted to mobile use with the help of a hacked 12v cigarette adapter and some alligator clips on the ends of the ground/calibration wires
__________________
'15 AW/SO F80 M3 6MT: IND cosmetic package, Gloss black grill surrounds, Macht schnell 15mm spacers all around, 3M crystalline
07 997 TT 6MT, Arctic Silver/Sea Blue: AWE exhaust, GIAC flash, H&R, 19" BBS CH-R in widebody fitment
A418t81 is offline   United_States
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 01:37 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST