i have a 04 cav with a 2.25 cat bak and im putting a hi-flow cat on what do i do with the o2 after the factory cat

I'm running into the same problem soon, i was just about to post the same question.

i have a full exhaust including a high flow cat. i didnt even touch the 02 sensor


FREE-DOM

If anything, just buy some spark plug nonfoulers, make sure they are the same thread, machine one out, if necissary, to fit the O2. Install them together with the O2, and you will no longer have CELs for the secondary O2! I had this settup on my cat-less Sunfire, and never saw a CEL pop up, and it would pass emissions, if I ever lived in an area that did emissions.


I miss my Sunfire, I want it back!
MMMM, HIDs
You will be missed.

what do you mean? you put it after the cat. Any muffler shop will weld a bung in for you

you buy a magnaflow cat that has the bung pre-installed, go worry free from there

The cat i got does not have a spot to put the O2 sensor in is possible to just cut out a hole and shove it in?

drill a hole and weld a bolt that fits the thread pattern of the sensor over the hole and bang instant sensor location.

Oh, I thought it was a question about getting rid of CELs, my bad.


I miss my Sunfire, I want it back!
MMMM, HIDs
You will be missed.

you can get an exhaust shop to install a bung for you.....

Joel Steward wrote:The cat i got does not have a spot to put the O2 sensor in is possible to just cut out a hole and shove it in?

ummmmm.....NO
the O2 does not have to be in the cat. Take it to an exhaust shop.

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