Any way to eliminate a CEL without a tune? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Matth3w · 08-18-2010, 05:23 PM

I had "off road" exhaust on one of my previous cars and all it took was a $15 MIL eliminator wired inline with the o2 sensor to remove the CEL permanently...is this possible on the SS?

I am thinking about going with a full JBA set up sometime within the next few months...but don't want to pony up for a tune quite yet because after I want to add an intake and maybe some cams before going to get it tuned.

2010 4 DW · 08-18-2010, 05:47 PM

Quote:

Originally Posted by Matth3w

I had "off road" exhaust on one of my previous cars and all it took was a $15 MIL eliminator wired inline with the o2 sensor to remove the CEL permanently...is this possible on the SS?

I am thinking about going with a full JBA set up sometime within the next few months...but don't want to pony up for a tune quite yet because after I want to add an intake and maybe some cams before going to get it tuned.

You can do the same thing on the new Camaro. Mil eliminators for 2nd set of cats and you should be fine.

Matth3w · 08-18-2010, 05:49 PM

What if I had no cats at all, just o2 bungs?

Russell James · 08-19-2010, 05:52 AM

Off road pipes normally don't have the second O2 bung.

You need to turn the post cat O2 codes off in the tuning. I doubt you'll find anyone selling O2 simulators any more, they were made illegal.

Matth3w · 08-19-2010, 07:11 AM

Oh ok, so a tune then. What does a tune usually run with those mods?

DSteck · 08-19-2010, 08:01 AM

Sorry, but I had to laugh at "cams".

A tune is really the only way you're going to solve the problem. Even high flow cats will still throw catalyst efficiency codes.

clg_98ta · 08-20-2010, 06:56 PM

When you remove the cats, you just need to plug in a set of O2 simulators into the plugs that used to connect to the post-cat O2 sensors. These have the same resistance as the O2 sensor reporting within the normal range. Without them, the OBD computer will report a problem with your cats.

You need to retain the pre-cat O2 sensors - the engine needs the feedback from these to run correctly. All the post-cat sensors do is verify the operation of the cats.

Matth3w · 08-22-2010, 04:05 PM

Do most of the longtibe off roads have the four bungs? Where can i get the o2 sims?

Kwik · 08-25-2010, 08:35 AM

You don't have to get a tune as soon as you install the headers. It can be done later. You won't get the full benefit of the headers until you do the tune though.

08-18-2010, 05:23 PM	#1
Matth3w Drives: '10 Camaro SS w/RS Victory Red 6spd Join Date: Mar 2010 Location: Ft. Huachuca, AZ Posts: 146	Any way to eliminate a CEL without a tune? I had "off road" exhaust on one of my previous cars and all it took was a $15 MIL eliminator wired inline with the o2 sensor to remove the CEL permanently...is this possible on the SS? I am thinking about going with a full JBA set up sometime within the next few months...but don't want to pony up for a tune quite yet because after I want to add an intake and maybe some cams before going to get it tuned.

08-20-2010, 06:56 PM	#7
clg_98ta Drives: 2010 Camaro 2SS Join Date: Jan 2010 Location: Austin, TX Posts: 2,698 View My Garage	When you remove the cats, you just need to plug in a set of O2 simulators into the plugs that used to connect to the post-cat O2 sensors. These have the same resistance as the O2 sensor reporting within the normal range. Without them, the OBD computer will report a problem with your cats. You need to retain the pre-cat O2 sensors - the engine needs the feedback from these to run correctly. All the post-cat sensors do is verify the operation of the cats. __________________ Black 2SS ordered 1/4/2010, received 2/19/2010

08-25-2010, 08:35 AM	#9
Kwik Drives: car Join Date: Feb 2010 Location: USA Posts: 801	You don't have to get a tune as soon as you install the headers. It can be done later. You won't get the full benefit of the headers until you do the tune though. __________________ Upgrades to suspension, brakes, motor and appearance. 482.7 RWHP- 434.2 RWT - All motor.

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08-18-2010, 05:49 PM	#3
Matth3w Drives: '10 Camaro SS w/RS Victory Red 6spd Join Date: Mar 2010 Location: Ft. Huachuca, AZ Posts: 146	What if I had no cats at all, just o2 bungs?

08-19-2010, 05:52 AM	#4
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	Off road pipes normally don't have the second O2 bung. You need to turn the post cat O2 codes off in the tuning. I doubt you'll find anyone selling O2 simulators any more, they were made illegal.

08-19-2010, 07:11 AM	#5
Matth3w Drives: '10 Camaro SS w/RS Victory Red 6spd Join Date: Mar 2010 Location: Ft. Huachuca, AZ Posts: 146	Oh ok, so a tune then. What does a tune usually run with those mods?

08-19-2010, 08:01 AM	#6
DSteck Account Suspended Drives: 2006 Corvette Z06 Join Date: Feb 2010 Location: St. Louis, MO Posts: 587	Sorry, but I had to laugh at "cams". A tune is really the only way you're going to solve the problem. Even high flow cats will still throw catalyst efficiency codes.

08-22-2010, 04:05 PM	#8
Matth3w Drives: '10 Camaro SS w/RS Victory Red 6spd Join Date: Mar 2010 Location: Ft. Huachuca, AZ Posts: 146	Do most of the longtibe off roads have the four bungs? Where can i get the o2 sims?