removing cat

[cncd11]

what are you guys doing when you remove the cat to prevent the check engine light to come on? on my sunfire i used the o2 simulator from rk sport. i took it off after i wrecked it so i can use it on anohter car. if i can i would like to use it on my balt.

[BlackBaltSS]

You cant remove the cat with stock programming without throwing a CEL. Im not sure if the o2 sim would work on your balt either since it was originally for the sunfire. But dont quote me on that cuz i could easily be wrong. If your going to remove the cat youll have to get a custom tune that you can adjust your own emissions settings. Save yourself some hassle and just get a high flow cat.

[BlackBalt]

Originally Posted by BlackBaltSS

You cant remove the cat with stock programming without throwing a CEL. Im not sure if the o2 sim would work on your balt either since it was originally for the sunfire. But dont quote me on that cuz i could easily be wrong. If your going to remove the cat youll have to get a custom tune that you can adjust your own emissions settings. Save yourself some hassle and just get a high flow cat.

Yes you can, people that do put one of those O2 sensor necks into the threaded fitting so only a small amount of exhaust gas can reach the O2 sensor and the ECU doesn't see that the catalyst has been removed.

Don't get rid of it though, especially if it's a daily driver, the amount of power you will gain from an economy car like the Cobalt isn't worth the extra pollution you will be putting out.

[nramlow2006]

Originally Posted by BlackBalt

Yes you can, people that do put one of those O2 sensor necks into the threaded fitting so only a small amount of exhaust gas can reach the O2 sensor and the ECU doesn't see that the catalyst has been removed.

Don't get rid of it though, especially if it's a daily driver, the amount of power you will gain from an economy car like the Cobalt isn't worth the extra pollution you will be putting out.

dont be one of those people.... lol... your average new car doesnt even need a cat considering they have the fuel burning process down to a science. lol.. but if it makes a difference .. i would highly recomend just putting a high flow cat on and then you dont have to worry about the o2 sensor going wild and you will gain that little amount of power you seek.;)

[BlackBalt]

The only cars that really would benefit from losing the cat are very high hp strictly racing cars. New catalysts aren't much of a restriction anyways...trust me, your car is slow now and it will be slow after taking the cat off, just polluting more. Also, messing with the smog control could get you in serious trouble depending on what state you're in. That's why I used the LSJ downpipe, it looks stock to the untrained eye, smog refs will never know the difference.

[cncd11]

first of all I live in michigan and there is mot any current emissions laws, second removing the cat on my sunfire .made a hugh diffrence. I also am not to worried about the emissions. does advance auto parts sell thoes o2 sensor necks? how much? that sounds like a good rout to go.

[BlackBalt]

Originally Posted by cncd11

first of all I live in michigan and there is mot any current emissions laws, second removing the cat on my sunfire .made a hugh diffrence. I also am not to worried about the emissions. does advance auto parts sell thoes o2 sensor necks? how much? that sounds like a good rout to go.

Dyno the car before and after removing the cat, I bet the difference will be negligible, especially with the stock tune.

You could get the O2 sensor necks at one of those ricer/import tuner type shops, as those are the only cars I have heard of using that type of setup.

[newcobalt06]

I now have a nissan 350Z and have removed the cats. On our cars we have to use what they call non-foulers. They basically raise the O2 senser. These parts were designed for spark plugs but are 18MM and work on O2 sensors as well depending on the car. I went trhough emmisions and they said the cats were they`re even thought they are`nt. I used the resonated test pipes. I do not know if it will work for cobalts but I will include the link. Removing my cats has made a huge differance for me. But also I have 2 of them.

Test Pipe SES Non-Fouler Fix... pics - MY350Z.COM Forums

[norcalbalt]

who would you say makes the best downpipe with a high flow cat for the ss/sc? random tech,zzp,xtc,id-tuning? let me know some of your opinions

[Chester]

doesnt it void your warranty ?