What if the life expectancy of O2 sensors? Reason I ask because I think my car is running a little on the rich side. My gas mileage is a little on the low side and I very rarely hammer the throttle, I can even small some raw gas out the tail pipe and I still have the cat on my car and that isn't giving problems...yet. What is a good replacement O2 sensor to go with?

 

i'm not sure what the life of them is suppose to be, maybe 60k miles?? Mine seamed to be working fine with 180k on them when i changed them. Also do not buy any o2 except fot the gm ac delco sensors, all the rest of them will crap out a lot sooner.

 

thanks, anyone else have some input for me? By the way I should mention my car has 117k miles.

 

why not install o2 sims from casper electronics?

 

95 single cat cars don't use after cat o2's so you don't need sim's nor would You want them. If u have 4 o2's just have the rear set programed out when you ditch the cat, it does the same thing and is cheaper.

 

Seems like he's talking about the fron o2 sensors. I don't think you want those deleted

 

agreed

 

Yup, I only have the 2 before the cat. Anyone know the typical life span of these? Any way to test them so I know if I need to replace them or not?

 

117k is past time to swap them. Get AC-Delco O2s.

 

You are a wise man Thank you.

 

Do 02's always throw a code? ..on a obd1. i am only getting like 160-180 miles to a tank and dont really beat on it. got 132k on mine and i think it is time for a change.
How long do they take to install.? are they really that hard to do?...not like plugs i hope

 

Not sure about bad 02 sensors throwing a code on the OBD1...I'm sure someone here knows...

...but it may be safe to assume you'll have a heck of a time getting the old ones off the car at 132K, and if you've driven the car year-round in Pennsylvania.

Do you have headers on your car or just stock manifolds?

When I put Hooker shorties on my car a few yrs. ago, the car only had 40k-ish on it, but b/c the car had gone through every Chicagoland winter up to when I bought it, we couldn't budge the pass. side sensor off the stock manifold in order to reuse it, so we had to make a run to Autozone for a new one.

I highly recommend buying an "O2 sensor socket" from Pep Boyeeeez/Auto Zone, etc. It's got a slot down the side of the socket to accommodate the wire coming out of the sensor. This will allow you to use a ratchet w/ the socket to get better leverage than an open-end wrench.

Drench those things in PB Blaster to help get 'em off, and put a little anti-seize on the new ones.

It may be a frustrating experience. It was for me the first time.

 

I have a 97 Z28, is this an OBDII with 4 O2 sensors? If so i'm also wondering when i delete the CATS, and add LT headers, will i have to reprogram? Sorry for hijacking the thread, just wondering.