Borla UEL Header and Stock Exhaust CEL - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

01s0uljah · 05-19-2013, 07:46 PM

Hey guys,

There's plenty of you guys out there with the Borla UEL headers and aftermarket exhaust systems, how'd you guys get around the CEL without a tune?

I ordered the Borla UEL headers and planning to run it with stock everything else for now, without a tune until my wallet agrees to pay for a tune.

SmsAlSuwaidi · 05-19-2013, 07:48 PM

well you should've searched, but considering you already created this thread.

You should add a defouler / O2 sensor spacer that ends up tricking the sensor.

DJCarbine · 05-19-2013, 07:53 PM

Just let the CEL be on until you get a tune. Only downside is no cruise control.

Its not worth removing the underpanel and doing defoulers if you are getting a tune.

SmsAlSuwaidi · 05-19-2013, 08:30 PM

Quote:

Originally Posted by DJCarbine

Just let the CEL be on until you get a tune. Only downside is no cruise control.

Its not worth removing the underpanel and doing defoulers if you are getting a tune.

considering his doing the headers, removing the under panel could be done with it

Mtlrick · 05-19-2013, 09:03 PM

I bought a Weapon-R o2 sensors

! 55 bucks.

FR-S Matt · 05-19-2013, 10:52 PM

Budget a tune with the headers if possible.

Mtlrick · 05-19-2013, 11:08 PM

next summer , I'll get a tune :P

frslee · 05-20-2013, 12:19 AM

So.. no cruise control with catless header?

TheSlickOne17 · 05-20-2013, 01:35 AM

eBay o2sensor spacer.

5 bucks.

Check the ECS motorsports borla header group buy

Fast_Freddy · 05-20-2013, 03:24 AM

I see no reason for a CEL as long as the secondary cat is left intact. The CEL is only triggered when the post-secondary cat O2 sensor reads too much oxygen because there are no upstream cats. If for some odd reason you do get a CEL for reduced catalyst efficiency a simple anti-fouler/CEL eliminator on the secondary O2 sensor should eliminate the CEL.

Do consider that the cheap anti-foulers are zinc plated mild steel that will rust very quickly and be impossible to remove later on should you need to replace the sensor, etc. IMO it's worth a few dollars to get one in 304ss. Also the angled versions seem to work better than straight ones.

ft_sjo · 05-20-2013, 03:48 AM

There is no 'post secondary cat o2 sensor'.

Fast_Freddy · 05-21-2013, 03:58 AM

Quote:

Originally Posted by ft_sjo

There is no 'post secondary cat o2 sensor'.

So where is the secondary (narrow band) O2 sensor installed? Is it after the primary cat but before the secondary cat? If so, a CEL eliminator should still work.

Just remember that whatever you do, NEVER PLACE A ANTI-FOULER ON THE PRIMARY (WIDE BAND) O2 SENSOR!!!

ft_sjo · 05-21-2013, 04:07 AM

Quote:

Originally Posted by Fast_Freddy

So where is the secondary (narrow band) O2 sensor installed?

It's immediately after the primary cat.

crizkay · 05-22-2013, 12:34 PM

I'm new to the whole header/cats game...would something like this on the Borla UEL trick the sensor?

http://www.ebay.com/itm/STAINLESS-ST...13a128&vxp=mtr

05-19-2013, 07:46 PM	#1
01s0uljah Senior Member Join Date: Jan 2012 Drives: SWP Subaru BRZ Sport-Tech 6AT Location: Toronto Posts: 218 Thanks: 2 Thanked 35 Times in 22 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Borla UEL Header and Stock Exhaust CEL Hey guys, There's plenty of you guys out there with the Borla UEL headers and aftermarket exhaust systems, how'd you guys get around the CEL without a tune? I ordered the Borla UEL headers and planning to run it with stock everything else for now, without a tune until my wallet agrees to pay for a tune.

05-19-2013, 07:48 PM	#2
SmsAlSuwaidi Boosted Join Date: Feb 2013 Drives: Not a supra....yet Location: Riverside,CA/ Abu Dhabi,UAE Posts: 2,925 Thanks: 487 Thanked 1,203 Times in 812 Posts Mentioned: 90 Post(s) Tagged: 2 Thread(s)	well you should've searched, but considering you already created this thread. You should add a defouler / O2 sensor spacer that ends up tricking the sensor. __________________ https://www.facebook.com/Smsalsuwaidiracing/

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05-19-2013, 07:53 PM	#3
DJCarbine Thupercharged Join Date: Mar 2013 Drives: 2013 FR-S Location: La Grange Park, IL. Posts: 1,501 Thanks: 116 Thanked 751 Times in 439 Posts Mentioned: 23 Post(s) Tagged: 0 Thread(s)	Just let the CEL be on until you get a tune. Only downside is no cruise control. Its not worth removing the underpanel and doing defoulers if you are getting a tune.

05-20-2013, 12:19 AM	#8
frslee Just drive it Join Date: Mar 2013 Drives: 13' FR-S Location: Maryland Posts: 1,122 Thanks: 97 Thanked 321 Times in 218 Posts Mentioned: 10 Post(s) Tagged: 3 Thread(s)	So.. no cruise control with catless header?

05-20-2013, 03:24 AM	#10
Fast_Freddy Senior Member Join Date: Jul 2012 Drives: Passat Location: East Coast Posts: 626 Thanks: 331 Thanked 188 Times in 130 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	I see no reason for a CEL as long as the secondary cat is left intact. The CEL is only triggered when the post-secondary cat O2 sensor reads too much oxygen because there are no upstream cats. If for some odd reason you do get a CEL for reduced catalyst efficiency a simple anti-fouler/CEL eliminator on the secondary O2 sensor should eliminate the CEL. Do consider that the cheap anti-foulers are zinc plated mild steel that will rust very quickly and be impossible to remove later on should you need to replace the sensor, etc. IMO it's worth a few dollars to get one in 304ss. Also the angled versions seem to work better than straight ones.

05-20-2013, 03:48 AM	#11
ft_sjo Banned Join Date: Oct 2012 Drives: GT86 Location: The Motherland Posts: 1,398 Thanks: 140 Thanked 473 Times in 271 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	There is no 'post secondary cat o2 sensor'.

05-22-2013, 12:34 PM	#14
crizkay Member Join Date: Jan 2013 Drives: 2013 BRZ Location: NOVA Posts: 71 Thanks: 17 Thanked 17 Times in 10 Posts Mentioned: 12 Post(s) Tagged: 1 Thread(s)	I'm new to the whole header/cats game...would something like this on the Borla UEL trick the sensor? http://www.ebay.com/itm/STAINLESS-ST...13a128&vxp=mtr

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