New Exhaust OBX RACING - Page 4 - Toyota Yaris Forums

1.5 · 02-25-2012, 07:31 PM

Whay are you changing the axel back portion?

malibuguy · 02-27-2012, 08:10 PM

Wow how about google that shit

47_MasoN_47 · 02-28-2012, 01:22 PM

Quote:

Originally Posted by malibuguy

Wow how about google that shit

lol http://lmgtfy.com/?q=purchase+hushpower+resonator

1.5 · 02-28-2012, 01:49 PM

Quote:

Originally Posted by 47_MasoN_47

lol http://lmgtfy.com/?q=purchase+hushpower+resonator

Is that how that website works? I always get so confused when I get there. lol

1.5 · 02-27-2012, 10:28 PM

True im looking more for ID.

hartley1080 · 02-28-2012, 12:10 AM

Will check the I.D. soon

47_MasoN_47 · 02-28-2012, 02:37 PM

It can be confusing. So many steps in the process :P

hartley1080 · 02-28-2012, 02:47 PM

Thanks for the link

07stlYaris · 03-06-2012, 11:47 AM

Just installed this OBX on my 07 LB and now I have a little bit of ping going on. I put one of the 2 Cats back in (after the O2 sensor) and figure that's the problem. Let me know if I should put the other Cat in or move the O2 sensor to after the Cat.???

Since both O2 sensors are basically seeing the same thing now I would guess I'm right with the location thing. just want a second opinion.

cali yaris · 03-06-2012, 01:03 PM

Stock location is after the first cat.
So the 2nd cat doesn't matter at all as far as the ECU is concerned.

If you have one cat, the second O2 sensor should be after that.

I'm surprised you aren't getting a CEL with both sensors seeing basically the same thing. Your car should be thinking your cat is not working.

07stlYaris · 03-06-2012, 01:22 PM

Got the CEL too, just didn't mention it. I'll be relocating the O2 sensor this weekend when I put in the resonator. Thanks for the quick reply and reaffirmation of my suspicions. Would the ECU lean out the mix because of what the 2nd O2 sensor sees?

Bluevitz-rs · 03-06-2012, 05:09 PM

The first sensor isn't an O2 sensor, it's a A/F sensor. The second is indeed an O2 and is only there to read what's coming out of the CAT.

cali yaris · 03-06-2012, 06:28 PM

Just keeping it simple. I knew he must be getting a CEL.

07stlYaris · 03-07-2012, 12:19 PM

Are they both the same thing just used for different purposes? Are there any other consequences to moving the O2 sensor further downstream? Should I wrap the headpipe to keep the cat warmer? Just trying to get as much info as possible before I get under there one more time.

cali yaris · 03-07-2012, 01:17 PM

^ The two sensors are not the same. Technically, the first one is more of an air/fuel sensor (though it's kind of a weird hybrid design by the way the ECU reads the voltages) and the second one is an O2 sensor to monitor the cat. Pretty sure that's all it does.

Why would you move it downstream?
And why would you want it to be "warmer"?

07stlYaris · 03-07-2012, 01:44 PM

Downstream past the Cat. Catalytic converters function better at higher temps leading to a more accurate reading for the O2 sensor. Higher temps within reason of course. I've seen melted catalyst in engines that ran waayy too lean. Anyway, thanks for the clarity on the sensors.

CTScott · 03-07-2012, 02:08 PM

Quote:

Originally Posted by cali yaris

^ The two sensors are not the same. Technically, the first one is more of an air/fuel sensor (though it's kind of a weird hybrid design by the way the ECU reads the voltages) and the second one is an O2 sensor to monitor the cat. Pretty sure that's all it does.

Why would you move it downstream?
And why would you want it to be "warmer"?

They are both platinum coated zirconia sensors, but the Air/Fuel sensor has the ability to detect the ratio over a wide range (i.e wide band sensor). The heated O2 sensor can only detect that the AFR is at stoich or is rich or lean - It can not detect how rich or lean it is.

So, the air/fuel sensor before the cat allows the ECM to precisely control the ratio and the heated O2 sensor after the cat allows the ECM to monitor that the fuel ratio is properly adjusted to allow optimal operation of the 3 stage cat (which performs best at an AFR of 14.7).

cali yaris · 03-07-2012, 02:01 PM

yes, as discussed the 2nd sensor must be AFTER the cat.

02-25-2012, 07:31 PM	#1
1.5 Form>Function Drives: 07 Flint Sedan Join Date: Dec 2009 Location: Tampa Posts: 4,018	Whay are you changing the axel back portion? __________________ Instagram: @southernstreets_phil Facebook.com/southernstreetsempire

02-27-2012, 08:10 PM	#2
malibuguy Obsessed with 1.5L Drives: '10 PW Yaris Sedan Join Date: Feb 2011 Location: Westminster, MD Posts: 908	Wow how about google that shit __________________ -Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr

02-27-2012, 10:28 PM	#5
1.5 Form>Function Drives: 07 Flint Sedan Join Date: Dec 2009 Location: Tampa Posts: 4,018	True im looking more for ID. __________________ Instagram: @southernstreets_phil Facebook.com/southernstreetsempire

02-28-2012, 02:37 PM	#7
47_MasoN_47 What I thought I'd do was View User's Garage Drives: 09 Yaris Sedan Join Date: Aug 2009 Location: Northwest Alabama Posts: 1,140	It can be confusing. So many steps in the process :P __________________ My Nissan Hardbody (D21) 4x4 build log Check out my YouTube channel (mostly shooting) - http://www.youtube.com/user/47MasoN47

03-06-2012, 11:47 AM	#9
07stlYaris If Its Not Blown It Sucks View User's Garage Drives: 07 Yaris LB Meteorite Join Date: Nov 2011 Location: STL Posts: 117	Running lean. What's up with that? Just installed this OBX on my 07 LB and now I have a little bit of ping going on. I put one of the 2 Cats back in (after the O2 sensor) and figure that's the problem. Let me know if I should put the other Cat in or move the O2 sensor to after the Cat.??? Since both O2 sensors are basically seeing the same thing now I would guess I'm right with the location thing. just want a second opinion.

02-28-2012, 12:10 AM	#6
hartley1080 Drives: 2008 Yaris Join Date: Nov 2009 Location: WNC Posts: 34	Will check the I.D. soon

02-28-2012, 02:47 PM	#8
hartley1080 Drives: 2008 Yaris Join Date: Nov 2009 Location: WNC Posts: 34	Thanks for the link

03-06-2012, 01:03 PM	#10
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	Stock location is after the first cat. So the 2nd cat doesn't matter at all as far as the ECU is concerned. If you have one cat, the second O2 sensor should be after that. I'm surprised you aren't getting a CEL with both sensors seeing basically the same thing. Your car should be thinking your cat is not working. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

03-06-2012, 01:22 PM	#11
07stlYaris If Its Not Blown It Sucks View User's Garage Drives: 07 Yaris LB Meteorite Join Date: Nov 2011 Location: STL Posts: 117	Got the CEL too, just didn't mention it. I'll be relocating the O2 sensor this weekend when I put in the resonator. Thanks for the quick reply and reaffirmation of my suspicions. Would the ECU lean out the mix because of what the 2nd O2 sensor sees?

03-06-2012, 05:09 PM	#12
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	The first sensor isn't an O2 sensor, it's a A/F sensor. The second is indeed an O2 and is only there to read what's coming out of the CAT.

03-06-2012, 06:28 PM	#13
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	Just keeping it simple. I knew he must be getting a CEL. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

03-07-2012, 12:19 PM	#14
07stlYaris If Its Not Blown It Sucks View User's Garage Drives: 07 Yaris LB Meteorite Join Date: Nov 2011 Location: STL Posts: 117	Different parts??? Are they both the same thing just used for different purposes? Are there any other consequences to moving the O2 sensor further downstream? Should I wrap the headpipe to keep the cat warmer? Just trying to get as much info as possible before I get under there one more time.

03-07-2012, 01:17 PM	#15
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	^ The two sensors are not the same. Technically, the first one is more of an air/fuel sensor (though it's kind of a weird hybrid design by the way the ECU reads the voltages) and the second one is an O2 sensor to monitor the cat. Pretty sure that's all it does. Why would you move it downstream? And why would you want it to be "warmer"? __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

03-07-2012, 01:44 PM	#16
07stlYaris If Its Not Blown It Sucks View User's Garage Drives: 07 Yaris LB Meteorite Join Date: Nov 2011 Location: STL Posts: 117	Downstream past the Cat. Catalytic converters function better at higher temps leading to a more accurate reading for the O2 sensor. Higher temps within reason of course. I've seen melted catalyst in engines that ran waayy too lean. Anyway, thanks for the clarity on the sensors.

03-07-2012, 02:01 PM	#18
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	yes, as discussed the 2nd sensor must be AFTER the cat. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

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