racerlinkfc

just wondering if i still needed the oxygen sensor on my 86 n/a one of the mechanic's told me that i really didnt' need all that emissions crap on the car and removed it all i put racing beat headers on the car just wondering if i need to have my oxygen sensor for the car to run normally . thanks

Sgt. Pepper

Wait wait wait.... A California mechanic told you you don't need all your emmisions crap I would stop going to him.
Keep your oxygen sensor, you don't need it but I believe it works with your ECU telling how much fuel to give under cruising conditions. It doesn't really have anything to do with emissions.

beefhole

iTrader: (29)

of course you need it

jgrts20

That my friend is wrong, if you dont have an o2 sensor you will not even pass visual out in cali. And it has everything to do with emissions. The reason why I know about CA emissions cause im moving there in july and desprately want to take my car with! So I have been resaerching everything from visual to even the CAP program and even connections.

anewconvert

iTrader: (1)

Accept that it does have to do with emissions. A rich engine and an overly lean engine will produce greater quantities of certain types of particulates or gases. So having a stoich or near stoich A/F ratio will prevent that from happening. The O2 sensor is the computers only way of knowing if it is running rich or lean. While cruising it uses the O2 sensor to decide how to adjust the fuel trim.


BC

hurleysurf24

iTrader: (3)

anyone have pics of where the o2 hooks up too .. because mine is currently not hooked to anything and i cant find any plug remotely near it that fits it .

NZConvertible

No, you will not notice any difference if it's not connected or working, unless you measure fuel consumption. If it's working properly you'll use ~5% less fuel in mixed-use driving.

WTF? It has everything to do with emissions. That's the only reason it's there. It allows the ECU to keep the AFR at stoichiometric during cruise, which is where the least emissions are produced.

racerlinkfc

look i appreciate all the knowledge you guys are giving me but i really dont care to much if it passes emissions or not . nothing a $100 to my smog guy can't fix to pass me . just wondering if its going to screw anything up thats all ... has anyone done this ? and would it give me any type of power increase. im going to hook up an aem wideband a/f meter this week. thanks well let me know .

KillaKitiie

umm yea your going to be running rich and your gas milleage is going to suck big time

Osirus9

iTrader: (10)

your car will run just fine without it. I didn't have a working one for a long time, and the car will run perfectly fine, but it will eat a little more gas.

KillaKitiie

The car will not run right!..it will run yes but not like it should,the ECU can tell if the o2 is bad or missing and will go into defualt mode which is rich as hell..resulting in shitty gas millege...your better off just hooking it up uless you have an SAFC or full standalone.

JSmith0101

iTrader: (6)

I don't have my O2 sensor hooked up and get about 23-24 mpg at 72 mph. The car runs fine. The O2 sensor helps so little, for me, it doesn't matter. In Cali, though, it does.

stevie1020

with my knowledge the ecu will substuite a value for it. as everyone else has said you will run rich with a wierd idle.

NZConvertible

It will no no negatives effects whatsoever other than the minor fuel consumption increase. I went without an O2 sensor for 8-9 months, so I know it makes no difference to how the engine runs.

Absolutely none. How would it?

Completely wrong. Did you read my post above?

This is also completely wrong. The ECU simply uses it normal fuel maps just like it does in all other driving conditions.

Jeez, where does this crap come from? The ECU ignores the O2 sensor at idle and any other time that isn't light-load cruising. How is not having one going to affect idle if the ECU isn't even looking at it?

JSmith0101

iTrader: (6)

I have not had an O2 sensor since I got my car. It works fine!

SpeedOfLife

iTrader: (16)

It'd prly run better if you did...