OBX Header/ O2 problem
#1
Evolving Member
Thread Starter
Join Date: Feb 2005
Location: Brampton
Posts: 114
Likes: 0
Received 0 Likes
on
0 Posts
OBX Header/ O2 problem
Last year I ordered the OBX headers which btw has a bung hole for the first O2 sensor to put in. I also ordered the CEL eliminator from RoadRace. At the time, i didn't know that the CEL eliminator was supposed to go on the second O2 sensor. So I had it put in on the first O2 sensor hole. A week after that, I found out it was on the wrong hole, so I got my mechanic to to take the spacer off and in doing so, it ended up breaking off. So basically, I had that hole plugged, and he made another bung hole just above the broken one and that is where my O2 sensor is in now.
Secondly, since the spacer was broken, I had the 2nd O2 sensor rerouted to AFTER the catylic converter
NOW --- I still get very BAD gas mileage on the car and the Check Engine Light is on. I got it read and it said:
P0171 - fuel system too lean in bank 1 (or something like that)
I know its a problem with the first O2 sensor. The second one I am assuming is perfectly fine.
Now is the problem the O2 sensor itself? Or is the problem with the new bung hole that was created for it? If I add a spacer for the O2 sensor, would that reverse the problem, or is the O2 sensor defective?
Thanks.
Secondly, since the spacer was broken, I had the 2nd O2 sensor rerouted to AFTER the catylic converter
NOW --- I still get very BAD gas mileage on the car and the Check Engine Light is on. I got it read and it said:
P0171 - fuel system too lean in bank 1 (or something like that)
I know its a problem with the first O2 sensor. The second one I am assuming is perfectly fine.
Now is the problem the O2 sensor itself? Or is the problem with the new bung hole that was created for it? If I add a spacer for the O2 sensor, would that reverse the problem, or is the O2 sensor defective?
Thanks.
#2
EvoM Staff Alumni
iTrader: (88)
Join Date: Aug 2003
Location: Concord Township, Ohio
Posts: 8,733
Likes: 0
Received 3 Likes
on
3 Posts
The first O2 sensor might be dead. Your car is 6 years old, I could easily see it wearing out and dying. I'm 99% sure you need a new front O2 sensor and the problems will all go away.
With your 2nd O2 sensor after the cat, you've totally solved the cat issue.
With your 2nd O2 sensor after the cat, you've totally solved the cat issue.
#3
Evolving Member
Thread Starter
Join Date: Feb 2005
Location: Brampton
Posts: 114
Likes: 0
Received 0 Likes
on
0 Posts
I ordered a front o2 sensor ... some sensor made by WALKER , about 100 bux off ebay. I will certianly try and replace it, however does it matter how far the o2 sensor plugs into the header? What if the sensor has to be further out. Couldn't that have been the reason it burned out in the first place?
#6
Newbie
iTrader: (2)
Join Date: Sep 2003
Location: Peoria, Il
Posts: 92
Likes: 0
Received 0 Likes
on
0 Posts
On the stock manifold the sensor is fully into the exhaust stream. One possible problem (not sure if this applies I haven't seen the OBX header) if your OBX header is like the RPW header and they put the O2 sensor in one exhaust runner instead of in the collector, you could have a problem with just that one cylinder (fuel supply or ignition). However I would start with the O2 sensor as that is more likely.
#7
Evolving Member
Thread Starter
Join Date: Feb 2005
Location: Brampton
Posts: 114
Likes: 0
Received 0 Likes
on
0 Posts
ohh that actually makes a little sense... so if I basically get a new O2 sensor - and the problem still occurs, Ill jsut get another bung hole made bellow in the collector , where all the cylnder exhaust is at. Right now it's sitting in the 2nd or third exhaust runner... i can't remember right now. Thanks.
Trending Topics
#9
Evolving Member
Thread Starter
Join Date: Feb 2005
Location: Brampton
Posts: 114
Likes: 0
Received 0 Likes
on
0 Posts
!!!!!!!!!!!!!!!!!!!!! CHECK ENGINE LIGHT CAME ON AGAIN!!!!!
What can the problem be? I replaced O2 sensor. Do I have to relocate the O2 sensor? Or add a non-fouler or something to it to make it read less oxygen?
What can the problem be? I replaced O2 sensor. Do I have to relocate the O2 sensor? Or add a non-fouler or something to it to make it read less oxygen?
#12
Evolving Member
Join Date: Jan 2005
Location: Orlando, FL
Posts: 256
Likes: 0
Received 0 Likes
on
0 Posts
Thread
Thread Starter
Forum
Replies
Last Post
pmwolf88
Lancer How Tos / Installations
1
Aug 29, 2015 12:31 AM
wake
04-06 Lancer Ralliart How To Requests / Questions / Tips
16
Sep 13, 2014 04:04 PM