Hey guys so my cat has been banged around for awhile now from the speed bumps in my apartments. Im having a buddy of mine at a exhaust shop put on a new cat and i happen to know these o2 sensors haven't been replaced. So my question to you guys is when he pulls the cat, will it be easy to unplug the secondary o2 sensor from underneath the car when the cat it already out? or will i still have to pull some carpet from the inside of the car to unplug it? i want this to be easy as pie so im not at the exhaust shop forever lol. Any help is appreciated guys. thanks again.

 

You can pull it easy with the cat on or off, its a simple task

 

Cool thanks man I just dont want to spend a grip of $ on the sensor if its gonna be a pain to put it in. how much better do u think the car will run with bew o2s? Or should I leave them alone since no code?


Posted from Honda-tech.com App for Android

 

if you have no 02 code..why mess with it>>?? dont spend money on something that is perfectly fine.

 

Well im tryin to put some money into the car to make it run better Im doing a whole fuel system and thought o2 sensors also....what would u do to insure the car runs better than before?


Posted from Honda-tech.com App for Android

 

Anything?...


Posted from Honda-tech.com App for Android

 

You have two oxygen sensors on the car obviously, both serve completely different purposes.

Front oxygen sensor (closest to the engine) monitors your air/fuel ratio. These are called a narrow-band sensor because they're only really good at reading (in your case) if the car is running leaner or richer than 14.7:1 air/fuel ratio. This one will effect fuel mileage if it's not reading correctly.

Rear oxygen sensor (furthest from the engine and after the cat) monitors the life of the cat itself. This sensor does nothing but compare the amount of fuel that is passing through the cat in regards to the front oxygen sensor. The rear oxygen sensor has nothing to do with fuel mileage and will not effect the way the car runs at all (But if its bad it will still throw a check engine light, obviously; just wont effect anything else).

The only things I would recommend for better fuel mileage and a better running car:

Tune up - Spark plugs, Wires, Cap, Rotor, Air and Fuel filters, valve adjustment, proper changing of any fluids that need it, so on and so forth. Don't neglect the fuel filter damnit!

Weight - Make sure you don't have any dead weight you don't need, this does NOT mean remove the spare tire, I wouldn't daily drive my car without the damn thing. But a cluttered car will weigh more which takes more energy to move around.

Tires/suspension - Keep your tires aired up to the proper level, make sure your bearings are in good shape and your car is in proper alignment.


I could go on... I've got a little 22 year old Toyota Celica with a 2.2L that's rated for 26mpg and I get 34mpg without breaking a sweat.


edit: By the way, to remove the oxygen sensors, you just simply unscrew them from the exhaust pipe and it's a single plug you disconnect, typically a foot away from the sensor and located under the car (very easy to get to and remove).

 

Wow man thanks for the detailed info...I think im gonna do a valve adjustment...ive done everything there is to do for maintence except valve adjustment...so thanks man.


Posted from Honda-tech.com App for Android