Installed headers -- Have some issues
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Joined: Jan 2009
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Installed headers -- Have some issues
Ok I bought a set of OBX headers. I installed them and they fit up ok, only issue with fitament is the brackets for the long tubes to the bellhousing are no where near close. Should I fab a bracket? I thought I remeber reading most people were not using them. So the exhaust is held by the rear spring hanger and the headers.
I also had my car mail order tuned by COW. I talked with him and was under the impression I should just install my rear O2 sensors to the front. I left the front ones unplugged. I went for a 15mile test drive and popped up 2 codes at the end, PO134 HC and PO154 HC. I searched and from what I have found that is the Front O2 sensor not reading.
It runs pretty hard and sounds ok, just the CEL popped up.
Is it still safe to drive?
Thanks
Scott
I also had my car mail order tuned by COW. I talked with him and was under the impression I should just install my rear O2 sensors to the front. I left the front ones unplugged. I went for a 15mile test drive and popped up 2 codes at the end, PO134 HC and PO154 HC. I searched and from what I have found that is the Front O2 sensor not reading.
It runs pretty hard and sounds ok, just the CEL popped up.
Is it still safe to drive?
Thanks
Scott
Le Mans Master
Joined: May 2007
Posts: 5,393
Likes: 17
From: Belleville Mich.
I think you will be fine w/out bolting up hangers to b/housing. The codes that you are showing ,and car is running great, you should be all right to drive. You need to get your car to a tuner and have your car tuned to your new headers and reset your electrical, so it stops throwing codes. Good luck.
Tech Contributor
Joined: Jan 2007
Posts: 19,245
Likes: 1,092
From: Dyer, IN
Ok I bought a set of OBX headers. I installed them and they fit up ok, only issue with fitament is the brackets for the long tubes to the bellhousing are no where near close. Should I fab a bracket? I thought I remeber reading most people were not using them. So the exhaust is held by the rear spring hanger and the headers.
I also had my car mail order tuned by COW. I talked with him and was under the impression I should just install my rear O2 sensors to the front. I left the front ones unplugged. I went for a 15mile test drive and popped up 2 codes at the end, PO134 HC and PO154 HC. I searched and from what I have found that is the Front O2 sensor not reading.
It runs pretty hard and sounds ok, just the CEL popped up.
Is it still safe to drive?
Thanks
Scott
I also had my car mail order tuned by COW. I talked with him and was under the impression I should just install my rear O2 sensors to the front. I left the front ones unplugged. I went for a 15mile test drive and popped up 2 codes at the end, PO134 HC and PO154 HC. I searched and from what I have found that is the Front O2 sensor not reading.
It runs pretty hard and sounds ok, just the CEL popped up.
Is it still safe to drive?
Thanks
Scott
Melting Slicks
Joined: Oct 2007
Posts: 2,464
Likes: 2
From: Cedarburg, WI
I have all my O2 sensors plugged in but I thought that guys moved the rears to the front and plugged them into the front harness. Is that not correct for those that do? I would think just rears into front locations would not be right. Aren't the front sensors used for fuel trims? 
Tech Contributor
Joined: Jan 2007
Posts: 19,245
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From: Dyer, IN
I have all my O2 sensors plugged in but I thought that guys moved the rears to the front and plugged them into the front harness. Is that not correct for those that do? I would think just rears into front locations would not be right. Aren't the front sensors used for fuel trims?
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Joined: Jan 2009
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Well that would be my problem then. I guess I need to order the adaptors. Its running fine the way it is so I guess I will order them next week.
Is there a chance COW does them a different way? Chuck never mentioned I needed adaptors.
Is there a chance COW does them a different way? Chuck never mentioned I needed adaptors.
Tech Contributor
Joined: Jan 2007
Posts: 19,245
Likes: 1,092
From: Dyer, IN
Doubtful...he probably assumed you knew what you were doing.....if you are going to drive it, I would use the front o2's in the front locations until you get your adapters.
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Le Mans Master
Joined: Feb 2006
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From: Phoenix AZ
That means your front O2's harness to the PCM was not hooked up and you were in open loop the whole time.
Just hook up the front ones to the harness for now so you can get to closed loop and the car will drive normal. Then order the adapters so you can hook the rear sensors (which get moved to the front bungs) to the front harness plugs.
Just hook up the front ones to the harness for now so you can get to closed loop and the car will drive normal. Then order the adapters so you can hook the rear sensors (which get moved to the front bungs) to the front harness plugs.
Drifting
Joined: Jan 2008
Posts: 1,722
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From: Florida
St. Jude Donor '09
Ok I bought a set of OBX headers. I installed them and they fit up ok, only issue with fitament is the brackets for the long tubes to the bellhousing are no where near close.
Race Director
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From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
They once were, until the mounting tab pulled out of the left pipe, leaving a nice sized hole in the collector. Once I welded that up, I disconnected the rt side tab before it could break off too.
Years later I bought a better set of headers (ARH) which smartly, don't even have a bellhousing mount provision.
Oh NO!!
Race Director
Joined: Feb 1999
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From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
When I was talking with Chuck I understood it that the rear 02 sensors switch/react quicker than the fronts. That being the reason for them being moved up front. Its been a while since we talked but that is what I seem to recall. Straighten me up if I am wrong. 
Drifting
Joined: Jan 2008
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From: Florida
St. Jude Donor '09
They once were, until the mounting tab pulled out of the left pipe, leaving a nice sized hole in the collector. Once I welded that up, I disconnected the rt side tab before it could break off too.
Race Director
Joined: Oct 2002
Posts: 16,477
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From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Back in 2002, the $1500 FLP header system was the latest and greatest on the market, the first "complete" system to the rear flanges too.
LGs didn't exist yet.
Kook's didn't exist yet
ARs didn't exist yet.
Made by Dynatech, the system came with both cats and straight pipes, X-pipe, and everything ceramic coated...it was a very good fitting and performing system, easy to install, and thus was quite popular. The one issue they did have, was the redundant bellhousing mount tabs...and once a few people had them break, most advised not utilizing them.
The point being, the mount tabs simply weren't needed then, and they still aren't needed today. So much so...most LT headers on the market now don't even have the provision for that mount.
Since it sounds like you also learned from experience, why don't you share your tales of exhaust gasket leakage caused by LT headers on a C5, since that is the point you were trying to make.
LGs didn't exist yet.
Kook's didn't exist yet
ARs didn't exist yet.
Made by Dynatech, the system came with both cats and straight pipes, X-pipe, and everything ceramic coated...it was a very good fitting and performing system, easy to install, and thus was quite popular. The one issue they did have, was the redundant bellhousing mount tabs...and once a few people had them break, most advised not utilizing them.
The point being, the mount tabs simply weren't needed then, and they still aren't needed today. So much so...most LT headers on the market now don't even have the provision for that mount.
Since it sounds like you also learned from experience, why don't you share your tales of exhaust gasket leakage caused by LT headers on a C5, since that is the point you were trying to make.
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
Back in 2002, the $1500 FLP header system was the latest and greatest on the market, the first "complete" system to the rear flanges too.
LGs didn't exist yet.
Kook's didn't exist yet
ARs didn't exist yet.
Made by Dynatech, the system came with both cats and straight pipes, X-pipe, and everything ceramic coated...it was a very good fitting and performing system, easy to install, and thus was quite popular. The one issue they did have, was the redundant bellhousing mount tabs...and once a few people had them break, most advised not utilizing them.
The point being, the mount tabs simply weren't needed then, and they still aren't needed today. So much so...most LT headers on the market now don't even have the provision for that mount.
Since it sounds like you also learned from experience, why don't you share your tales of exhaust gasket leakage caused by LT headers on a C5, since that is the point you were trying to make.
LGs didn't exist yet.
Kook's didn't exist yet
ARs didn't exist yet.
Made by Dynatech, the system came with both cats and straight pipes, X-pipe, and everything ceramic coated...it was a very good fitting and performing system, easy to install, and thus was quite popular. The one issue they did have, was the redundant bellhousing mount tabs...and once a few people had them break, most advised not utilizing them.
The point being, the mount tabs simply weren't needed then, and they still aren't needed today. So much so...most LT headers on the market now don't even have the provision for that mount.
Since it sounds like you also learned from experience, why don't you share your tales of exhaust gasket leakage caused by LT headers on a C5, since that is the point you were trying to make.
Thread Starter
Advanced
Joined: Jan 2009
Posts: 57
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So I can say for certain that the fronts will not reach the LT position. I can do a few different things. I can splice the needed wires together. I was going to take apart the connectors and reuse them, but naturally the squares are female and so are the inline ones so thats a no go.
I have to drive the car 60miles back home.
I have yet to find anywhere to order the adaptors.
I have to drive the car 60miles back home.
I have yet to find anywhere to order the adaptors.
Banned Scam/Spammer
Joined: Feb 2007
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From: Oklahoma City
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16-'17,'19,'22
You have to call LG. They don't have them on their website from what I hear.
They were telling you to hook up your fronts like normal until you get the adaptors. You will need 02 extensions for them to plug in since they are further downstream than stock.
BTW I run my front sensors up front and have no codes or problems.
They were telling you to hook up your fronts like normal until you get the adaptors. You will need 02 extensions for them to plug in since they are further downstream than stock.
BTW I run my front sensors up front and have no codes or problems.
Racer
Joined: Jun 2005
Posts: 341
Likes: 1
From: Akron Ohio
I just got back from my 300 mile drive after installing my OBX headers, I put the O2 sensors in the correct locations front to front and back to back, is this wrong? I had to extend the rear O2 wiring to fit the new location. everything works great, the car runs super and i am not throwing any codes. Should I be Ok the way I am?