After CAT 02 Sensors

mr spree · 10-20-2009, 06:08 PM

Well after calling many exhaust shops, everyone of there concerns is the placement of the 02 sensors after the cats. One shop told me about the simulators. Has anyone found these to work? Or I could contact Jared at CPW and see what he could do about it.

Here is the website i found for the Sims.

http://www.afterthoughtsauto.com/o2sim.html

tiresmokinV8 · 10-20-2009, 07:14 PM

What exactly is their concern? Put a bung in a few inches after the cat and your done. Or even just tune out those sensors since all they do is monitor the cats anyways and tell the computer that everything about the cats are gravy.

***SweetS10V8*** · 10-20-2009, 07:32 PM

Yup, post cat O2s are only to tell the ECU if the cats are working or not. Most people, including Jared, can just click a button in a tune file and tell the computer to ignore them basically.

Unless you have to pass an emissions check and they have to be able to read the post cat outputs.

mr spree · 10-20-2009, 10:57 PM

exactly, i have to go through emissions. So wouldn't they be able to see if you got rid of the 02 sensors from the computer?

tiresmokinV8 · 10-21-2009, 12:35 AM

I dont know if my tuner turned mine off or not but I recently looked through the list in hptuners of my current tune for codes and what the ecm will do with them and for the post cat it has "no ses light" or something like that. Anyways Ive still passed my e-check several times since the tune.

01cherryreds10 · 10-21-2009, 01:18 AM

If you are using the stock computer with no tune they will be able to see. But with a reflashed ECM the game completely changes. I'd love to see all the things you could do with a program like that.

turbobandit · 10-21-2009, 01:42 AM

even going through emissions, you can program to send out a "dummy" code to the serial port.

my truck has no cats, and no rear 02's... but plug in a scanner, and they'll read just fine

hahahaha.

mr spree · 10-21-2009, 02:46 AM

how did you go about doing that turbobandit?

01cherryreds10 · 10-21-2009, 11:04 AM

It's all in the computer just send it out to Jared for a total reflash and he'll take care of the O2 problems.

BLAZIN1990 · 10-21-2009, 12:40 PM

good info thanks guys i needed to know for the future

***SweetS10V8*** · 10-21-2009, 11:43 PM

Quote: Originally Posted by turbobandit

even going through emissions, you can program to send out a "dummy" code to the serial port.

my truck has no cats, and no rear 02's... but plug in a scanner, and they'll read just fine hahahaha.

Im sure you could also wire in a resistor, so the mV dont change also.

mr spree · 10-22-2009, 01:11 AM

anyone try these?
http://www.afterthoughtsauto.com/o2sim.html

10-20-2009, 06:08 PM	#1
mr spree Whats this for? Age: 20 Join Date: Jan 2008 Posts: 1,013 Location: Spokane WA User is: OffLine	After CAT 02 Sensors Well after calling many exhaust shops, everyone of there concerns is the placement of the 02 sensors after the cats. One shop told me about the simulators. Has anyone found these to work? Or I could contact Jared at CPW and see what he could do about it. Here is the website i found for the Sims. http://www.afterthoughtsauto.com/o2sim.html
	[Reply w/Quote]

10-20-2009, 07:14 PM	#2
tiresmokinV8 Not so Avg Age: 23 Join Date: Nov 2007 Posts: 903 Location: Cuy. Falls, OH User is: OffLine	Re: After CAT 02 Sensors What exactly is their concern? Put a bung in a few inches after the cat and your done. Or even just tune out those sensors since all they do is monitor the cats anyways and tell the computer that everything about the cats are gravy.
	[Reply w/Quote]

10-20-2009, 10:57 PM	#4
mr spree Whats this for? Age: 20 Join Date: Jan 2008 Posts: 1,013 Location: Spokane WA User is: OffLine	Re: After CAT 02 Sensors exactly, i have to go through emissions. So wouldn't they be able to see if you got rid of the 02 sensors from the computer?
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10-21-2009, 12:35 AM	#5
tiresmokinV8 Not so Avg Age: 23 Join Date: Nov 2007 Posts: 903 Location: Cuy. Falls, OH User is: OffLine	Re: After CAT 02 Sensors I dont know if my tuner turned mine off or not but I recently looked through the list in hptuners of my current tune for codes and what the ecm will do with them and for the post cat it has "no ses light" or something like that. Anyways Ive still passed my e-check several times since the tune.
	[Reply w/Quote]

10-21-2009, 01:18 AM	#6
01cherryreds10 Former S10 enthusiast Age: 19 Join Date: Jan 2007 Posts: 5,640 Location: Illinois User is: OffLine	Re: After CAT 02 Sensors If you are using the stock computer with no tune they will be able to see. But with a reflashed ECM the game completely changes. I'd love to see all the things you could do with a program like that.
	[Reply w/Quote]

10-21-2009, 01:42 AM	#7
turbobandit Registered User Join Date: Aug 2009 Posts: 248 Location: User is: OffLine	Re: After CAT 02 Sensors even going through emissions, you can program to send out a "dummy" code to the serial port. my truck has no cats, and no rear 02's... but plug in a scanner, and they'll read just fine hahahaha.
	[Reply w/Quote]

10-21-2009, 02:46 AM	#8
mr spree Whats this for? Age: 20 Join Date: Jan 2008 Posts: 1,013 Location: Spokane WA User is: OffLine	Re: After CAT 02 Sensors how did you go about doing that turbobandit?
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10-21-2009, 11:04 AM	#9
01cherryreds10 Former S10 enthusiast Age: 19 Join Date: Jan 2007 Posts: 5,640 Location: Illinois User is: OffLine	Re: After CAT 02 Sensors It's all in the computer just send it out to Jared for a total reflash and he'll take care of the O2 problems.
	[Reply w/Quote]

10-21-2009, 12:40 PM	#10
BLAZIN1990 Registered User Join Date: Jun 2006 Posts: 194 Location: User is: OffLine	Re: After CAT 02 Sensors good info thanks guys i needed to know for the future
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10-22-2009, 01:11 AM	#12
mr spree Whats this for? Age: 20 Join Date: Jan 2008 Posts: 1,013 Location: Spokane WA User is: OffLine	Re: After CAT 02 Sensors anyone try these? http://www.afterthoughtsauto.com/o2sim.html
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