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Maybe someone can help. I installed a Catco 3" inlet, 3" outlet on my 2001 Firebird about 8 years ago. I recently installed the OBX Headers and replaced both front O2 sensors but I think the honeycomb finally broke lose insdie the cat. I think I bought the catco cat with an air breather tube while I remember the original cat not having an air breather. I had to put the O2 sim immediately after installing that high flow cat. Is this why I was having so much trouble with the P0140 (Low O2 rear) code and P0420 (inefficienct cat) code?
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Zaino; FireBatCave Decals; Red Inside<br /><br />K&N Filter & Lid; Removed MAF screen; FRA; Raised Air Box; 180°F Stat; BMR STB; 3\" Catco & S-pipe; Borla Cat-Back; O2 Sim; HPPIII; NGK TR55s; Taylor 8mm wires<br /><br /> <a href=\"http://www.cardomain.com/id/cbass300\" target=\"_blank\">http://www.cardomain.com/id/cbass300</a> -
Re: High Flow Cat
Maybe your sim is going bad. I'm running wide open y pipe atm and won't be pulling amy codes after I get my psp back on. -
Re: High Flow Cat
I ran a highflow cat and through no codes....the air tube might have caused that code. just move the 02 bung back a little and that will help too, but I didnt throw any with my cacto hi flow (without air tube)Comment
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