Going catless...

[Mesarina]

Hi, im almost new to the nissan world, my car is a 94 180sx, and I want to get rid of my cat, if I put a test pipe, what can I do with the rear o2 sensor? put a new bung? disconect the sensor? what will the stock ecu do if I do that?

Thanks

[ILoveMyRHS13]

Punch out the factory cat. It's free, but more work.

[mrgreeneyes]

its a 94.

no secondary o2.

problem solved

edit. its a 180. idk bro

[Mesarina]

so I won't have problems with the stock tune? no codes or anything?

[blacksrjdm]

No, there wont be a code or any problems. Unless you consider better throttle response to be a problem. If you need a test pipe for it, then buy a test pipe for your application and it will have the O2 bung if you need it and if you dont need it then it wont have one.

[Mesarina]

No, there wont be a code or any problems. Unless you consider better throttle response to be a problem. If you need a test pipe for it, then buy a test pipe for your application and it will have the O2 bung if you need it and if you dont need it then it wont have one.

Thanks, Problem is, I can get a test pipe with and without the o2 bung formy aplication, that's why I am asking here

[blacksrjdm]

Well, then find out if you have an O2 sensor in the cat. Lay underneath that thing and find out. Very very very very very very very easy to figure out. Then buy the proper test pipe.

[Mesarina]

Well, then find out if you have an O2 sensor in the cat. Lay underneath that thing and find out. Very very very very very very very easy to figure out. Then buy the proper test pipe.

I already did that, that's why I am asking what to do with it, not if I have or don't have one...

[blacksrjdm]

Asking what here??????

Dude, just what are you asking????????????

If you have an O2 sensor in the cat, then get the test pipe with the O2 bung in it. If you dont have an O2 sensor in the cat, then get the test pipe without the O2 bung. Whats so hard about that????? Dont, however, get rid of the O2 sensor if it has one, being that the ecu will throw a code if it isnt plugged in and metering the exhaust air.

If you have already seen that you do or do not have an O2 sensor in the cat, what is the problem????? Seems pretty self explanatory if it has an O2 or not get the test pipe to fit your application with or without the bung. There is nothing at all difficult about that.

[zenki-S13]

just get the one with the bung for the o2if you made a mistake and needed the run with out it you can always pug it off

i wouldnt remove the sensor though if you have oneit may make your car run to lean or rich

[Didderson]

when you buy one w/ a bung for the O2 they usually come w/ a bolt that you can seal the hole with if you don't have an o2. if you buy one w/ a bolt to seal that hole then you have the availability of using an o2 later, or plugging in your existing one that you cannot seem to grasp how to figure out if it exists or not lol..

[blacksrjdm]

when you buy one w/ a bung for the O2 they usually come w/ a bolt that you can seal the hole with if you don't have an o2. if you buy one w/ a bolt to seal that hole then you have the availability of using an o2 later,

Another well made point, also should be obvious when after recieving said item.

[Mesarina]

Asking what here??????

Dude, just what are you asking????????????

If you have an O2 sensor in the cat, then get the test pipe with the O2 bung in it. If you dont have an O2 sensor in the cat, then get the test pipe without the O2 bung. Whats so hard about that????? Dont, however, get rid of the O2 sensor if it has one, being that the ecu will throw a code if it isnt plugged in and metering the exhaust air.

If you have already seen that you do or do not have an O2 sensor in the cat, what is the problem????? Seems pretty self explanatory if it has an O2 or not get the test pipe to fit your application with or without the bung. There is nothing at all difficult about that.

You just need to put "Dont, however, get rid of the O2 sensor if it has one," lol... you know the second o2 sensor (after cat) reads leaner than the 1st sensor, and that's how the ecu know it is working correcty? That's why I asked if the ecu would make any changes if I put a test pipe, because both sensor would read almost the same afr, or if I needed a 02 simulator, or spacer, now I know i can put the test pipe, the o2 sensor and live with it, and it won;t affect performance, Thanks for your anwers

[Mesarina]

when you buy one w/ a bung for the O2 they usually come w/ a bolt that you can seal the hole with if you don't have an o2. if you buy one w/ a bolt to seal that hole then you have the availability of using an o2 later, or plugging in your existing one that you cannot seem to grasp how to figure out if it exists or not lol..

lol... I put "what can I do with the rear o2 sensor?" not "how do i know if I have a rear o2 sensor"