rear 02 sensors on long tube headers
05-03-2006, 07:26 AM
#1
Drifting
Thread Starter
rear 02 sensors on long tube headers
When installing long tube headers, how are the rear 02 sensors installed? Is it passenger side to passenger side and drivers side to drivers side or are they criscrossed.
I'm positive they were criscrossed when I took the H pipe off, but have read that they should go left to left and right to right, or does it really matter.
I'm positive they were criscrossed when I took the H pipe off, but have read that they should go left to left and right to right, or does it really matter.
05-03-2006, 08:17 AM
#3
Racer
Rear O2 Sensors
Just put headers and high flow cats on the rear sensor are crossed. The drivers side wiring goes to the passenger side sensor and the passenger side wire goes to the drivers sensor.
05-03-2006, 08:57 AM
#4
Le Mans Master
Member Since: Aug 2004
Location: NE OH
Posts: 6,684
Received 1,039 Likes
on
610 Posts
St. Jude Donor '09-'10
On our 2004 it was:
Front passenger side sensor wire goes to passenger side located front wire plug
Front driver side sensor wire goes to driver side located front wire plug
Rear passenger side sensor wire goes to driver side located rear wire plug
Rear driver side sensor wire goes to passenger side located rear wire plug
I just traced wires before i uninstalled anything and marked plugs w/ tape labels saying whihc O2 sensor ran to em.
The again, since we have 04 w/ the higher wattage sensors and am running all 4 we didn't have to move/swap positions of any; they all stayed in same position.
All is well
Front passenger side sensor wire goes to passenger side located front wire plug
Front driver side sensor wire goes to driver side located front wire plug
Rear passenger side sensor wire goes to driver side located rear wire plug
Rear driver side sensor wire goes to passenger side located rear wire plug
I just traced wires before i uninstalled anything and marked plugs w/ tape labels saying whihc O2 sensor ran to em.
The again, since we have 04 w/ the higher wattage sensors and am running all 4 we didn't have to move/swap positions of any; they all stayed in same position.
All is well
Last edited by BudgetPlan1; 05-03-2006 at 09:39 AM.
05-03-2006, 09:01 AM
#5
Safety Car
Member Since: Aug 2000
Location: Murphy TX
Posts: 4,154
Likes: 0
Received 1 Like
on
1 Post
Cruise-In II Veteran
Originally Posted by MYRagtop
I'm positive they were criscrossed when I took the H pipe off, but have read that they should go left to left and right to right, or does it really matter.
The factory routing of the rear O2 sensors and the attachment of the sensor to the harness at the opposite side of the car may seem odd at first glance, but it's done so that the sensor cable only has to make one right angle turn (rather than a 180 and another 90 to route up the same side.) The fronts don't have this issue and attach as you would expect. Both front and rear however do follow the simplest physical route.
05-03-2006, 09:47 AM
#6
Race Director
Member Since: Sep 2003
Location: Now in God's Country, the Big Sky, Montana!
Posts: 13,550
Likes: 0
Received 4 Likes
on
4 Posts
Cruise-In 7-8-9-10 Veteran
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
Originally Posted by ToplessTexan
The only time you need to run left to left and right to right is when you are installing a set of rear sensors to be used as front sensors and so are connecting to the front O2 harness positions. Otherwise, connect them the same way you found them.
The factory routing of the rear O2 sensors and the attachment of the sensor to the harness at the opposite side of the car may seem odd at first glance, but it's done so that the sensor cable only has to make one right angle turn (rather than a 180 and another 90 to route up the same side.) The fronts don't have this issue and attach as you would expect. Both front and rear however do follow the simplest physical route.
The factory routing of the rear O2 sensors and the attachment of the sensor to the harness at the opposite side of the car may seem odd at first glance, but it's done so that the sensor cable only has to make one right angle turn (rather than a 180 and another 90 to route up the same side.) The fronts don't have this issue and attach as you would expect. Both front and rear however do follow the simplest physical route.
Sorry if I caused any confusion, I'm only running two sensors, that's why mine are not crossed.
05-03-2006, 10:51 AM
#7
Safety Car
Member Since: May 2002
Location: waterloo ontario
Posts: 3,615
Likes: 0
Received 1 Like
on
1 Post
St. Jude Donor '08
It's the rears that are causing all the confusion-the fronts obviously go left to left and right to right-but i guess the rears are crossed according to everyone here.
