Stocker

Fun fact: if your fueling was way off because of the bad O2 sensor, it could have killed your brand-new catalytic converter. 02.gif

dddude55

High flow cat may not remove enough of the bad stuff to make the secondary o2 sensor happy.

radu_rd2

<div class='quotetop'>QUOTE (streettibb28 @ Apr 7 2010, 08:26 AM) <{POST_SNAPBACK}></div><div class='quotemain'>I know its not my cat its brand new Magnaflow high flow cat.</div>

It's probably your cat. Most of the people here have always had a hard time finding aftermarket cats that are good enough to not trip up that code (yes, even magnaflows).
I have a magnaflow that barely works (it tripped up the code once or twice but once I cleared it was ok for a long while).

You can use a spark plug non-fouler to install the secondary O2 slightly outside of the stream and trick the ECU this way, DTN did this on his.

streettibb28

Thanks everyone for the help. I did the spark plug non-fouler and i am keeping my fingers crossed lol. I will come back with results haha.

cheers.

David Dickson

Never use cheapo Magnaflow cats. They SUCK! Get a high quality one from Random Technology Cat and you'll never had that problem again.

streettibb28

^^ Will keep note of that prob over the summer i will replace it with the one you mentioned thank you.

Okay good news I got no codes and I passed emissions so it worked =). Thanks again for everyones help.

cheers