Welcome to the North American Subaru Impreza Owners Club Friday September 24, 2021
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Built Motor Discussion

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 07-25-2021, 10:06 PM   #1
WRXXXED
Scooby Specialist
 
Member#: 432652
Join Date: Oct 2015
Location: Gap, PA
Vehicle:
2010 Subaru WRX STI
61K (Gray)

Default Why am I running through Bosch 4.2 LSU wideband sensors?

I posted this in the "electrical and lighting" category as well and don't know if this or that thread is the right one

So this is my second Bosch 4.2 LSU wideband sensor in about a 6 month period and im wondering if my exhaust has anything to do with it?

I'm running a rotated setup and my downpipe is touching the firewall some and im assuming causing vibrations in the exhaust and in turn the sensor as well. Could the exhaust vibrations contribute to sensor failing? From my understanding the sensors are ceramic based to deal with the harsh environments of the exhaust system and fragile so to say. Let me know your thoughts and opinions!
* Registered users of the site do not see these ads.
WRXXXED is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-26-2021, 06:13 AM   #2
snow_bound26
Scooby Specialist
 
Member#: 395793
Join Date: Jul 2014
Chapter/Region: Tri-State
Location: SLC and Lake Placid
Vehicle:
2005 92x Aero
Beige

Default

Where is the sensor positioned on the pipe? And is the bung on the top, bottom or side of the pipe?
snow_bound26 is online now   Reply With Quote
Old 07-26-2021, 07:55 AM   #3
Homemade WRX
Scooby Guru
 
Member#: 33782
Join Date: Mar 2003
Chapter/Region: MAIC
Location: Mooresville, NC
Vehicle:
96 3MI Racing
search FIRST, then PM!!!

Default

^^^ my first questions were also going to be its placement on the exhaust. My first thought was water/condensation.
Homemade WRX is offline   Reply With Quote
Old 07-26-2021, 08:39 AM   #4
WRXXXED
Scooby Specialist
 
Member#: 432652
Join Date: Oct 2015
Location: Gap, PA
Vehicle:
2010 Subaru WRX STI
61K (Gray)

Default

The sensor is located about 12-14 inches down from the turbo. Its on the side of the downpipe. The bung is welded as the pipe goes down vertically so the bung is fitted horizontally
WRXXXED is offline   Reply With Quote
Old 07-26-2021, 09:13 AM   #5
snow_bound26
Scooby Specialist
 
Member#: 395793
Join Date: Jul 2014
Chapter/Region: Tri-State
Location: SLC and Lake Placid
Vehicle:
2005 92x Aero
Beige

Default

It could potentially be catching enough moisture to cause it to fail. They are quite sensitive to condensation. Typically it is suggested to weld the bung in a horizontal section of pipe and angle the sensor to face as downward as possible so it can't collect as much condensation.

It's not so much when the car is running, but what happens in the pipe after it's shut off
snow_bound26 is online now   Reply With Quote
Old 07-26-2021, 01:05 PM   #6
JSR84
Scooby Specialist
 
Member#: 469585
Join Date: Jun 2017
Chapter/Region: W. Canada
Vehicle:
2009 STi
White

Default

Quote:
Originally Posted by WRXXXED View Post
I posted this in the "electrical and lighting" category as well and don't know if this or that thread is the right one

So this is my second Bosch 4.2 LSU wideband sensor in about a 6 month period and im wondering if my exhaust has anything to do with it?

I'm running a rotated setup and my downpipe is touching the firewall some and im assuming causing vibrations in the exhaust and in turn the sensor as well. Could the exhaust vibrations contribute to sensor failing? From my understanding the sensors are ceramic based to deal with the harsh environments of the exhaust system and fragile so to say. Let me know your thoughts and opinions!
What type of controller are you using. Please say Innovate.
JSR84 is offline   Reply With Quote
Old 07-26-2021, 01:42 PM   #7
WRXXXED
Scooby Specialist
 
Member#: 432652
Join Date: Oct 2015
Location: Gap, PA
Vehicle:
2010 Subaru WRX STI
61K (Gray)

Default

Quote:
Originally Posted by JSR84 View Post
What type of controller are you using. Please say Innovate.
It's a AEM uego wideband
WRXXXED is offline   Reply With Quote
Old 07-26-2021, 01:44 PM   #8
JSR84
Scooby Specialist
 
Member#: 469585
Join Date: Jun 2017
Chapter/Region: W. Canada
Vehicle:
2009 STi
White

Default

Quote:
Originally Posted by WRXXXED View Post
It's a AEM uego wideband
Ok, there goes my theory. Ha
JSR84 is offline   Reply With Quote
Old 07-26-2021, 01:46 PM   #9
WRXXXED
Scooby Specialist
 
Member#: 432652
Join Date: Oct 2015
Location: Gap, PA
Vehicle:
2010 Subaru WRX STI
61K (Gray)

Default

Quote:
Originally Posted by snow_bound26 View Post
It could potentially be catching enough moisture to cause it to fail. They are quite sensitive to condensation. Typically it is suggested to weld the bung in a horizontal section of pipe and angle the sensor to face as downward as possible so it can't collect as much condensation.

It's not so much when the car is running, but what happens in the pipe after it's shut off
Thata good to know. I feel like I've actually heard that info somewhere before but I don't know why I didn't think of it. I'll have to weld in a new one somewhere else, there's a minimum distance from the exhaust housing they recommend right? I would love to just put it right behind the turbo so it's such easy acess but I'm not sure if the exhaust turbulence coming out of the turbo would cause it to read off. I don't see why it would but I guess you never know.
WRXXXED is offline   Reply With Quote
Old 07-26-2021, 02:34 PM   #10
JSR84
Scooby Specialist
 
Member#: 469585
Join Date: Jun 2017
Chapter/Region: W. Canada
Vehicle:
2009 STi
White

Default

Quote:
Originally Posted by WRXXXED View Post
Thata good to know. I feel like I've actually heard that info somewhere before but I don't know why I didn't think of it. I'll have to weld in a new one somewhere else, there's a minimum distance from the exhaust housing they recommend right? I would love to just put it right behind the turbo so it's such easy acess but I'm not sure if the exhaust turbulence coming out of the turbo would cause it to read off. I don't see why it would but I guess you never know.

I've had mine about 3 inches from the V Band for about 2 years.
JSR84 is offline   Reply With Quote
Old 07-26-2021, 03:09 PM   #11
undyjr
Scooby Specialist
 
Member#: 459692
Join Date: Dec 2016
Chapter/Region: South East
Location: Hampton Roads Va
Vehicle:
2019 WRX STI
silica black

Default

The bung on my Grimmspeed down pipe is inches from the turbine outlet and angled down for drainage.
undyjr is offline   Reply With Quote
Old 07-26-2021, 03:37 PM   #12
WRXXXED
Scooby Specialist
 
Member#: 432652
Join Date: Oct 2015
Location: Gap, PA
Vehicle:
2010 Subaru WRX STI
61K (Gray)

Default

Quote:
Originally Posted by JSR84 View Post
Ok, there goes my theory. Ha
Lmao, yeah on my project car I was running a innovate controller (LC-1) and it bricked on me... just went with an AEM on that car as well lol, from everyone's responses about having their sensors just inches from the turbine I'm going to weld a new bung there and hope for the best.

Thanks everyone
WRXXXED is offline   Reply With Quote
Old 07-26-2021, 08:26 PM   #13
blurred
Scooby Newbie
 
Member#: 47143
Join Date: Nov 2003
Location: Toronto
Default

AEM mounted to the side about 5-6" from the turbine. Still running after 35-40k miles


Last edited by blurred; 07-26-2021 at 08:31 PM.
blurred is offline   Reply With Quote
Old 07-31-2021, 07:54 AM   #14
TurboQueef
NASIOC Supporter
 
Member#: 86700
Join Date: May 2005
Location: Otsego, MI
Vehicle:
2005 STI
Silver/Black,[email protected]

Default

I am chasing issues with frying the sensor in my FXT. I am running Innovate controllers, tried two different controllers and both the 4.2 and 4.9 sensors. I have changed the sensor location and still burn them out. I am running the old clunker side feed injectors and notice rich spikes every so often and suspect the rich condition is making angry the sensor until it fries.

I run an Innovate in my STi rotated set up with zero issues. It is using the first controller Innovate introduced to the market (LM1).

At any rate, what is your AFR upon start up, idle cruise?


Last edited by TurboQueef; 07-31-2021 at 08:02 AM.
TurboQueef is offline   Reply With Quote
Old 07-31-2021, 02:42 PM   #15
WRXXXED
Scooby Specialist
 
Member#: 432652
Join Date: Oct 2015
Location: Gap, PA
Vehicle:
2010 Subaru WRX STI
61K (Gray)

Default

Quote:
Originally Posted by TurboQueef View Post
I am chasing issues with frying the sensor in my FXT. I am running Innovate controllers, tried two different controllers and both the 4.2 and 4.9 sensors. I have changed the sensor location and still burn them out. I am running the old clunker side feed injectors and notice rich spikes every so often and suspect the rich condition is making angry the sensor until it fries.

I run an Innovate in my STi rotated set up with zero issues. It is using the first controller Innovate introduced to the market (LM1).

At any rate, what is your AFR upon start up, idle cruise?

With the bad sensor I have now (did the brake clean test and didn't change reading) it's been .4-.6 afrs leaner compared to my AP "AFR sensor 1 ratio" for whatever load is put on the car throughoutthe entire powerband. I have a new sensor but haven't had the time to put that sensor in yet, ill update what those numbers are when the new sensor is put in.

Last edited by WRXXXED; 08-01-2021 at 06:32 AM.
WRXXXED is offline   Reply With Quote
Old 07-31-2021, 11:22 PM   #16
Paul
Scooby Guru
 
Member#: 56203
Join Date: Feb 2004
Chapter/Region: Tri-State
Location: south nj
Vehicle:
00 RSTI Coupe
Twin Scroll 2.5XTR EJ207

Default

Supposedly on some of the wideband controllers the wiring is important since you only want it on when car is running...not with car off but key on pretty sure it is something to do with the sensors heating element. I've never had an issue with my zeitronix zt2 but worth looking into
Paul is offline   Reply With Quote
Old 08-01-2021, 04:06 AM   #17
can250
Scooby Newbie
 
Member#: 452601
Join Date: Aug 2016
Default

I'm just about to install one in my car and this is straight from the instructions sent with the sensor install at least 24" inches from turbo and at a position between 9.00 o'clock and 3.00 o'clock
can250 is offline   Reply With Quote
Old 08-01-2021, 06:36 AM   #18
WRXXXED
Scooby Specialist
 
Member#: 432652
Join Date: Oct 2015
Location: Gap, PA
Vehicle:
2010 Subaru WRX STI
61K (Gray)

Default

Quote:
Originally Posted by Paul View Post
Supposedly on some of the wideband controllers the wiring is important since you only want it on when car is running...not with car off but key on pretty sure it is something to do with the sensors heating element. I've never had an issue with my zeitronix zt2 but worth looking into
I have it wired so that the wideband controller is only on when the key is forward in the "accessory" and "on" position, so I should be good there
Quote:
Originally Posted by can250 View Post
I'm just about to install one in my car and this is straight from the instructions sent with the sensor install at least 24" inches from turbo and at a position between 9.00 o'clock and 3.00 o'clock
And interesting, a person here said that their part straight from the manufacturer was only a few inches from the turbine
WRXXXED is offline   Reply With Quote
Old 08-01-2021, 08:32 AM   #19
TurboQueef
NASIOC Supporter
 
Member#: 86700
Join Date: May 2005
Location: Otsego, MI
Vehicle:
2005 STI
Silver/Black,[email protected]

Default

Somewhat relating to this thread, it may be worth considering by cylinder AFR balancing. Especially if you are making power. I just created a thread to detail my test & result:

https://forums.nasioc.com/forums/sho...4#post46606854
TurboQueef is offline   Reply With Quote
Old 08-25-2021, 01:31 AM   #20
usdmf
Scooby Newbie
 
Member#: 526173
Join Date: Aug 2021
Default

NGK is a more tolerant, robust wideband. I wouldn't buy another Bosch.
usdmf is offline   Reply With Quote
Old 08-25-2021, 01:57 PM   #21
benflynn
Scooby Specialist
 
Member#: 515308
Join Date: Jun 2020
Default

They sure last well in a vw. Since 04 I have had to replace one of my 5 innovate Bosch wideband sensors
benflynn is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 -4. The time now is 07:58 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.