How do you install a o2 sensor

LayZieBoNeLBurNa · Post by **LayZieBoNeLBurNa** » June 2nd, 2009, 12:12 am

i just bought a oxygen sensor the one closes to the radiator anyone know how to install it

i just bought a mazda eunos 30x 1994 model and it keeps missfiring and i got it serviced and still doing the same but it doesnt have a oxygen sensor ?

help please

Ryan · Post by **Ryan** » June 2nd, 2009, 12:16 am

With a wrench and some anti-seize. Not rocket science.

It didn't have an O2 sensor? Just a hole in the manifold? That must have been very loud.

LayZieBoNeLBurNa · Post by **LayZieBoNeLBurNa** » June 2nd, 2009, 12:32 am

yea it didnt come with a o2 sensor i dont know why
is that maybe the reason why its missfiring?

yea well i dont know where to connect the other end since there was none there before

Ryan · Post by **Ryan** » June 2nd, 2009, 8:49 am

Its a single wire clip coming out of the injector harness I believe. Grey. Should be hanging out near the thermostat somewhere. Wait, 1994... it may not be single wire, I don't know for sure, but it should be in the same place.

muttpower · Post by **muttpower** » June 2nd, 2009, 9:09 am

Have you tried checking the online manuals section first??? Either way, like Ryan said, it's fairly straightforward.

RS_OBD'oh_2 · Post by **RS_OBD'oh_2** » June 2nd, 2009, 9:20 am

LOL..
Sorry to laugh, but this is easier than changing the air filter or a spark plug. So, guessing you have the right O2 sensor.. it screws right in to the manifold. It should only have about 1 foot worth of wire on it.. that plugs into the connector sitting right below your disty. There should be 2 there. One front and one rear. These are a suggested 100 000 km replacement part, so it might be worth doing the rear if you need to. The rear sensor is about 120.00 any where you look.

wytbishop · Post by **wytbishop** » June 2nd, 2009, 10:22 am

4 cylinder car. Only one O2 sensor.

RS_OBD'oh_2 · Post by **RS_OBD'oh_2** » June 2nd, 2009, 5:38 pm

Must just be the 96 with 2 then. I know I have 2.

Ryan · Post by **Ryan** » June 2nd, 2009, 5:46 pm

OBDII cars have 2 sensors. Pre cat and post cat. Pre helps fine tune the mixture, and post essentially checks to see if the cat is working, doesn't really affect engine behavior at all.

RS_OBD'oh_2 · Post by **RS_OBD'oh_2** » June 2nd, 2009, 7:53 pm

so.. on a side note.. how can a narrow band O2 determine the working condition of the Cat if 0-1V is all it can read? It is a 4 wire however. It must have more functions than a basic o2. That being said, the new CS header has both O2 bungs... So I'm guessing it should not be throwing a code if there is no cat.

Ryan · Post by **Ryan** » June 3rd, 2009, 12:39 am

Any variation in signal is enough. Being a heated sensor (4 wire) it stays at a constant temperature so the only changing factor is the O2 content, therefore it can be more accurate.

That is my understanding of post cat sensors. Not sure why any header would have two, that seems superfluous.

RS_OBD'oh_2 · Post by **RS_OBD'oh_2** » June 3rd, 2009, 12:40 am

like a 3rd nut

Ryan · Post by **Ryan** » June 3rd, 2009, 12:42 am

Yeah. Ask Corksport, I'm sure they have a good reason.

If: "Its just a place to put the other one"

Then: No one buy the header.

LayZieBoNeLBurNa · Post by **LayZieBoNeLBurNa** » June 3rd, 2009, 3:01 am

lol yea dont worry i installed it
the front one near the radiator

its still missfiring

is the back o2 sensor hard to get too??

and yea mines 6 cyl not 4

muttpower · Post by **muttpower** » June 3rd, 2009, 3:21 am

ok then...can we get a bump to V6 tech forum???

MX-3.com

How do you install a o2 sensor

How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor

Re: How do you install a o2 sensor