CEL after removing cat? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

corvino26 · 12-12-2012, 01:37 AM

Will I get a CEL after removing my catalytic converter and replacing with a test pipe? Would an o2 defouler or eliminator be needed?

ngabdala · 12-12-2012, 01:42 AM

You will not unless you change your header (also catted) to a non-catted. I can't see many if any aftermarket headers coming with a cat.

corvino26 · 12-29-2012, 05:17 PM

Quote:

Originally Posted by ngabdala

You will not unless you change your header (also catted) to a non-catted. I can't see many if any aftermarket headers coming with a cat.

what i was thinking of doing was getting a catless header and putting a 02 delete on it like the one in the link below... any thoughts?

http://www.ebay.com/itm/O2-Oxygen-Se...5b7d00&vxp=mtr

ngabdala · 02-02-2013, 08:02 PM

I've been banned from here for over a month but I still wanted to get back to you. I'm having a muffler shop do it for me.

Quote:

Originally Posted by corvino26

what i was thinking of doing was getting a catless header and putting a 02 delete on it like the one in the link below... any thoughts?

http://www.ebay.com/itm/O2-Oxygen-Se...5b7d00&vxp=mtr

kosoku · 02-02-2013, 08:12 PM

More than likely you WILL get a check engine light. The post o2 sensor will go nuts.

AVOturboworld · 02-02-2013, 08:16 PM

If you remove the primary cat in the header, you will definitely get a CEL if you don't take steps to compensate. If you remove the secondary cat, there's nothing back there to take issue with that fact.

corvino26 · 05-16-2013, 04:36 AM

Quote:

Originally Posted by kosoku

More than likely you WILL get a check engine light. The post o2 sensor will go nuts.

The part that I posted screws into the second o2 bung and the sensor screws into that piece... Once I get some cash up I will try it out and report back

TAP Auto Parts · 05-20-2013, 03:58 PM

yes it will. I recommend the vibrant 02 simulator.
bj@tapautoparts

swift996 · 06-17-2013, 09:15 AM

Quote:

Originally Posted by AVOturboworld

If you remove the primary cat in the header, you will definitely get a CEL if you don't take steps to compensate. If you remove the secondary cat, there's nothing back there to take issue with that fact.

This!

Some people have used washers to "fix" this issue. Search around the forum there's a lot on this. I have a catted header with no CEL issue.

12-12-2012, 01:42 AM	#2
ngabdala Vortech Supercharged Join Date: Apr 2012 Drives: WRB BRZ 6MT LTD Location: Massachusetts Posts: 1,447 Thanks: 1,897 Thanked 467 Times in 283 Posts Mentioned: 13 Post(s) Tagged: 1 Thread(s)	You will not unless you change your header (also catted) to a non-catted. I can't see many if any aftermarket headers coming with a cat. __________________ Powered by Vortech, ECS Tuning, and JDL Auto Design

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AVOturboworld Join Date: Jan 2012 Drives: 2013 "AVO Orange" FR-S Location: Seattle, WA Posts: 1,067 Thanks: 69 Thanked 2,277 Times in 636 Posts Mentioned: 108 Post(s) Tagged: 2 Thread(s)	If you remove the primary cat in the header, you will definitely get a CEL if you don't take steps to compensate. If you remove the secondary cat, there's nothing back there to take issue with that fact.

05-20-2013, 03:58 PM	#8
TAP Auto Parts Banned Join Date: Sep 2012 Drives: FRS Location: Las Vegas Posts: 303 Thanks: 442 Thanked 104 Times in 74 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	yes it will. I recommend the vibrant 02 simulator. bj@tapautoparts

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