Stupid question

[jfran430]

Umm ok not too sound like a moron or anything, but while searching for an O/R x-pipe I decided to look around for new O2 sensors while I was at it. Now when i put my H-pipe on my 5.0 there were only 2 O2 sensors on the pipe and i replaced those two. So now im looking for my cobra and im finding pre and post-cat sensors ..? Sooo i have 4 O2 sensors on there and do they all need to be replaced?

 

[Stangdriver13]

When i put my x-pipe on i didn't change any of the o2 sensors but my car also had under 40k miles at the time...if your car has low milage i wouldn't see the need to replace them. Also, yes your car does have 4 o2 sensors and the o/r pipe will have a place for each of the four sensors

 

[blackfang]

There is no need to replace the sensors UNLESS they are bad. You can just swap them onto the new pipe. Keep in mind the CEL will come on being you have no cats so either get them tuned off or get MIL illiminators.

96+ have 4 sensors(2 upstream and 2 downstream sensors after the cats)

 

[jfran430]

Well im not sure when they were replaced last, so i planned on just replacing them (car has 107K now). But i'm only going to need MIL's for the post cat sensors, correct?

 

[blackfang]

Well im not sure when they were replaced last, so i planned on just replacing them (car has 107K now). But i'm only going to need MIL's for the post cat sensors, correct?

Again, if they are not bad, you don't need new ones. If you want to fork over extra dough then, sure. Get all 4 new ones then

Yes, you will need the MIL's for the rear sensors.