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Old 11-10-2010, 06:52 PM   #1
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Headers

I have read that headers set a code because of the O2 location but can't we move the O2 ourselves to another spot, like weld a new bung on or something? there has to be a way to prevent it other then a tune? Also what would happen if you just drove with the light on and don't put a tune in so that the dealer can't say anything. What would the effects be?
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Old 11-10-2010, 07:00 PM   #2
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You can't move the the cats to their stock location with long tubes, leaving the CEL on is annoying and then you won't know if there is another problem if it comes up.
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Old 11-10-2010, 07:05 PM   #3
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Get 2" bung extensions that screw into the o2 bung and you will have no problems. It will pull your sensor out of the exhaust stream and read fine.
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Old 11-10-2010, 07:17 PM   #4
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That does not address the aft sensors, they are further away from their stock locations and thats why they fault... Is that not right?
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Old 11-10-2010, 08:54 PM   #5
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So will anything happen if you just leave the light on? Will it run ok? How about running a pipe and then a coupling to screw the o2 into so that its pretty close to where the factory o2's where? Just a idea
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Old 11-10-2010, 09:02 PM   #6
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So will anything happen if you just leave the light on? Will it run ok? How about running a pipe and then a coupling to screw the o2 into so that its pretty close to where the factory o2's where? Just a idea
i heard the car runs weird without tuning it with headers
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Old 11-10-2010, 09:12 PM   #7
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TJBUSA is right, the 02 sensors are now in a different spot, and will throw a code with any LT headers. I suppose you could somehow drill in a threaded hole for an 02 sensor if you want....but most guys have them turned off when they get a tune. But it is not the cats I do not think that throws a code...just the 02 sensor.

I have had my headers and new catback on for about 3 weeks, but I needed a new camshaft and my tuner wants me to wait a tad longer before I get it tuned. It seems to run fine without a tune, but I am sure I am missing out on some power until I do.
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Old 11-10-2010, 09:19 PM   #8
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Other than you not knowing if another engine code developed a more serious issue, no

The problem with the CEL and headers is the aft sensors are downstream of your cats are now a further distance away from the exhaust maniford and the factory sensors can't perform like they once did.
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Old 11-10-2010, 11:37 PM   #9
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The o2 sensors throw a flag because of what it is sensing. With it pulled out of the exhaust stream, it does not sense it so the cel light does not trigger from what I have heard. I do not have this setup, but hear a few on here do have LT headers the the extensions and no Cel light and no tune.
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Old 11-10-2010, 11:44 PM   #10
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i heard the car runs weird without tuning it with headers
Nope. Mine runs fine. I have a light. No issues. I want the light gone, but I just don't want to tune yet.
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Old 11-11-2010, 01:23 AM   #11
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Nope. Mine runs fine. I have a light. No issues. I want the light gone, but I just don't want to tune yet.
Tag,

I remember reading a thread where you reset the CEL and after a couple resets, the light didn't return. I jut installed ARH on my mbrp 3" and CEL came on quick. I cleared it 2 times. Worth clearing again?

This is temp since FI will be ordered within a month and it will be tuned.
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Old 11-11-2010, 07:11 AM   #12
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I have read that headers set a code because of the O2 location but can't we move the O2 ourselves to another spot, like weld a new bung on or something? there has to be a way to prevent it other then a tune? Also what would happen if you just drove with the light on and don't put a tune in so that the dealer can't say anything. What would the effects be?
Installing long tube headers without a tune is kinda like buying a new pair of running shoes, putting them on but not lacing and tying them. You'll not experience the full benefit of either.
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Old 11-11-2010, 07:41 AM   #13
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Mine also runs fine with O2 extenders (rear) and no cats and no tune. Bunch of misinformation in this thread...
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Old 11-11-2010, 07:57 AM   #14
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The extensions you speak of are needed because the aft sensors are too far away for the stock harness to reach. Its all about heat.
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Old 11-11-2010, 08:13 AM   #15
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Mine also runs fine with O2 extenders (rear) and no cats and no tune. Bunch of misinformation in this thread...
Keep on driving, you will get it...

I went 1400 miles before I got mine.

http://www.camaro5.com/forums/showthread.php?t=58363
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Old 11-11-2010, 08:20 AM   #16
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why not just get shortys....no tune needed and the long tubes void your drive train warrenty anyways....
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Old 11-11-2010, 08:40 AM   #17
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why not just get shortys....no tune needed and the long tubes void your drive train warrenty anyways....
Huh....funny....I've got long tubes and my drivetrain warranty hasn't be voided.

Not to say it can't be down the road but just putting on LTs doesn't automatically void your warranty.
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Old 11-11-2010, 08:47 AM   #18
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Huh....funny....I've got long tubes and my drivetrain warranty hasn't be voided.

Not to say it can't be down the road but just putting on LTs doesn't automatically void your warranty.
and with shorties, you won't gain the HP you will with LT's
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Old 11-11-2010, 08:50 AM   #19
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Get 2" bung extensions that screw into the o2 bung and you will have no problems. It will pull your sensor out of the exhaust stream and read fine.
Would like to add that I have over 5500 miles with the extensions, no lights no problems.

I did recently get a tune due to a cam ugrade and my tuner left the rear ones on. We're curious to see if they come on.
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Old 11-11-2010, 09:54 AM   #20
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Headers

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The extensions you speak of are needed because the aft sensors are too far away for the stock harness to reach. Its all about heat.

How about using a wire extension on the aft sensors like the front? Will that help?
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Old 11-11-2010, 10:39 AM   #21
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The extensions you speak of are needed because the aft sensors are too far away for the stock harness to reach. Its all about heat.
If you are speaking of wire extensions, no, the stock harness reaches the rear O2 sensors just fine with either Kooks or OBX longtubes.

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Keep on driving, you will get it...

I went 1400 miles before I got mine.
2500 miles and counting. No CEL.

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How about using a wire extension on the aft sensors like the front? Will that help?
That won't do anything. You need to run 2" long sparkplug antifouler style O2 extenders (not extensions).
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Old 11-11-2010, 10:51 AM   #22
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If you are speaking of wire extensions, no, the stock harness reaches the rear O2 sensors just fine with either Kooks or OBX longtubes.



2500 miles and counting. No CEL.



That won't do anything. You need to run 2" long sparkplug antifouler style O2 extenders (not extensions).
I think if you do not have the 2" long sparkplug antifouler style O2 extenders then you need the harness extension. I needed them for mine with OBX. But the 2" extenders pull the sensor out of the exhaust stream to keep you from have a cel light with no tune. For anyone that wants to learn more about this, do some research in google then make a decision.
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Old 11-11-2010, 12:06 PM   #23
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I think if you do not have the 2" long sparkplug antifouler style O2 extenders then you need the harness extension. I needed them for mine with OBX. But the 2" extenders pull the sensor out of the exhaust stream to keep you from have a cel light with no tune. For anyone that wants to learn more about this, do some research in google then make a decision.
So I guess one of you needed wire extenders and the other needed antifouler extenders so being that I am going to use the same headers OBX I will use both types of extenders. By the way how do you like the OBX and who's cats work with them?
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Old 11-11-2010, 12:41 PM   #24
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I think if you do not have the 2" long sparkplug antifouler style O2 extenders then you need the harness extension.
Nope, my rear O2 harness reached with or without the 2" long extenders. I did have to buy wire extensions for the front sensors though.

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So I guess one of you needed wire extenders and the other needed antifouler extenders so being that I am going to use the same headers OBX I will use both types of extenders. By the way how do you like the OBX and who's cats work with them?
Kooks cats work with OBX longtubes. However, if you run the 2" extenders on the rear sensors, you can run the straight pipes that come with the headers without a CEL.
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Old 11-11-2010, 01:28 PM   #25
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Hicompression, your right on the extensions and the sparkplug antifouler, absolutely worth the try. I found this link in doing it yourself and total cost...about $10.00 because we have two cats insted of one. I know what I am going to do when I get a little time this weekend......
http://forums.evolutionm.net/evo-how...cel-light.html
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