oxygen sensor help - Performance Forum

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oxygen sensor help
Wednesday, January 04, 2006 9:36 AM
I had a check engine light come on and i was told that it was an oxygen sensor. however i have a none stock header on my car and so i was told that i should just get o2 fakeouts?? where could i get a fakeout and is that really the problem?

Re: oxygen sensor help
Wednesday, January 04, 2006 9:40 AM
It is the 02 after your cat. It usually has nothing to do with your header. I believe that is a common problem with all our cars..

Just do s search for your answer. Would link for you but I am too lazy

http://registry.gmenthusiast.com/images/importkilla32/Bullit.JPG
Re: oxygen sensor help
Wednesday, January 04, 2006 12:55 PM
u have 2 oxygen sensors you have to get the code read to find out which one it is. if it it for the one in the header you probably need a new one. i would get it asap as it will rob your car of its power and waste more gas.

If the code says bank 1 sensor 2 ect. its for the after cat sensor which you could do a sim. for




Re: oxygen sensor help
Thursday, January 05, 2006 6:21 AM
so you have never heard of needing fakeouts b/c of the aftermarket header? i should just get a new o2 sensor?
Re: oxygen sensor help
Thursday, January 05, 2006 8:29 AM
They don't make "fake outs" (more commonly referred to as a sim or simulator), for the primary O2 sensor. If thats the sensor that is bad, you need to replace it.





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Re: oxygen sensor help
Thursday, January 05, 2006 8:40 AM
ok thanks
Re: oxygen sensor help
Tuesday, January 10, 2006 6:48 AM
ok so i was looking for my o2 sensor and i figured out that i don't think that when new headers were put on that the o2 sensor was put on. is this a problem or will this just give me a check engine light and not cause any real problems?
Re: oxygen sensor help
Tuesday, January 10, 2006 7:53 AM
Ya that's a problem. Are you saying there is an open hole in the header where the O2 sensor would go, or did they put a plug in it? Is the sensor just hanging there in open air, or is it gone altogether?


15.3 @ 89.97mph, 14's on the way?
Re: oxygen sensor help
Wednesday, January 11, 2006 6:39 AM
well i looked all over the header and either they pluged the hole and made the plug flush or the new header didn't have a hole. what problems would it cause to not have a o2 sensor
Re: oxygen sensor help
Wednesday, January 11, 2006 8:57 AM
The engine has no means of telling if it's rich or lean under normal driving conditions (everything but WOT), so it's likely running pig rich as a precautionary measure, which will ruin your fuel economy, rob power, and wreck your catalytic convertor. Get it fixed.

What kind of cheap ass header did you get that doesn't have an O2 bung?


15.3 @ 89.97mph, 14's on the way?
Re: oxygen sensor help
Thursday, January 12, 2006 6:17 AM
well i still am getting 30MPG... and for my exhaust i have

OBX 4-1 Header
Magnaflow High Flow Cat
2 1/4 Bent Tubing
Ractive 4.5 straight Cut Tip Muffler

but thanks for the help

Re: oxygen sensor help
Thursday, January 12, 2006 2:08 PM
Kev K wrote:well i still am getting 30MPG... and for my exhaust i have

OBX 4-1 Header
Magnaflow High Flow Cat
2 1/4 Bent Tubing
Ractive 4.5 straight Cut Tip Muffler

but thanks for the help


There's always the chance it's running really lean then, bad news for you. I havn't seen any pics of the OBX header, but if you can find one it would make it alot easier to find the O2 bung, I'm sure there has to be one as ALL fuel injected cars need at least one to monitor AF ratios under normal driving.


15.3 @ 89.97mph, 14's on the way?
Re: oxygen sensor help
Friday, January 13, 2006 7:44 AM
well i know that there is an O2 sensor down by the Cat... however i'm not sure what that regulates... but i know i'm supposed to have two o2 sensors
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