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Old 12-12-2012, 02:37 AM   #1
corvino26
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CEL after removing cat?

Will I get a CEL after removing my catalytic converter and replacing with a test pipe? Would an o2 defouler or eliminator be needed?
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Old 12-12-2012, 02:42 AM   #2
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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.
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Old 12-29-2012, 06:17 PM   #3
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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
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Old 02-02-2013, 09:02 PM   #4
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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.

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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
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Old 02-02-2013, 09:12 PM   #5
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More than likely you WILL get a check engine light. The post o2 sensor will go nuts.
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Old 02-02-2013, 09:16 PM   #6
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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.
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Old 05-16-2013, 04:36 AM   #7
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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
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Old 05-20-2013, 03:58 PM   #8
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Send a message via Skype™ to TAP Auto Parts
yes it will. I recommend the vibrant 02 simulator.
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Old 06-17-2013, 09:15 AM   #9
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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.
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