I have an 08 and just put cat back and jwt pop chargers on it. I want to put test pipes or high flow cats on it, and was wondering what I could do about the CEL coming on. (Which I know is unavoidable) do O2 extenders help? Or do I pretty much have to get them tuned out and/or live with the check engine light on?

 

tuned would be better, especially with all the breathing mods

 

Cool. I want to tune it, but not until I'm completely done with mods. I was just wondering if anything could be done to clear a CEL in the meantime.

 

you can try the extenders in the mean time, with you having the hr... there arent alot of breathing mods, you pretty much did them all already

 

I still plan on doing the Z1 intake plenum. Other than that, you're right that's all there is.

 

hrs will have the ses light no tricks that actually work but tune as trav said

 

Thanks man, I guess I'll live with it until I can get it tuned. It will pass emissions after tuning though, right?

 

we don't have emissions testing in hillbilly country.. I'm not sure how in depth the inspections are down there

 

if you have a service engine light on in tx you will not pass

 

Where I'm at currently doesn't require emissions testing, but I will be moving to a bigger city in the next year. I'm wondering if the tune tricks the computer into proper o2 readings, or if just keeps it from going into "ready" status which won't throw a CEL but if the OBD connection on the emissions tester sees a non-ready status then it won't allow it to pass.

 

It depends on the county. Only counties that require you to pass emissions won't pass state inspections. I live in Corpus Christi, which is in Nueces county and we don't test for emissions here.

 

it will show as not ready, i think you can have 3 not ready's and still pass

 

I think it changed to two a couple years ago...

 

just swap cats before testing?

 

dunno... mine has always passed after having the back o2 sensors turned off

 

Luckily I'm a tech at a Nissan dealership, so that wouldn't seem too bad of an idea. I would hate to snap a stud or something.

 

just nuts and bolts

use anti-seize, should be cake

 

Think I'll try the extenders/non-fouler road with steel wool and see if that works. If not, I guess I'll swap the cats back and forth.