LS1 bird

I just installed pacesetter headers on my 02 firebird.I have 4 O2 sensors.Two of them fit perfectly in the headers.But what do i do wit the other 2?Jus disconnect them?

teke184

iTrader: (5)

leave them unpluged.

the rears are for confirming the operation of the cats. you will get an SES light from it untill you tune them out. but it won't affect the running condition of the car

LS1 bird

awesome thank u.Thats wat i thought but just wanted to make sure

L SS 1

I hope u plugged in the upstream sensors, which require extensions or vette o2 sensors. rears need simulators or need to be tuned out for no check engine light.

hcb1700

iTrader: (9)

Yeah, just leave them unplugged and tuck the harness real good so it won't come in contact with the headers. I got the computer tuned, since I installed cam and heads, and eliminated the rear O2's while at it.

99screamindemon

so if you do not use the rear o2 sensors but do not get them tuned out right away that will not affect how your car runs?? would the car run like **** without the front 02 sensors or how does that work??

Greekey

iTrader: (3)

The car will not run without front o2 sensors. You can leave the rears out for years without problems. The rears only monitor how your cats are working, nothing else. Dont even think about not using front o2's.

99screamindemon

that is what i though t i was just making sure. i was not even thinking about not using the fronts that would be ridiculous lol

Greekey

iTrader: (3)

would the car run like **** without the front 02 sensors or how does that work?? lol

MjMaro

iTrader: (11)

Yes it will run like **** without front O2's

What does the O2 sensor do?
It is the primary measurement device for the fuel control computer in your car to know if the engine is too rich or too lean. The oxygen sensor is positioned in the exhaust pipe and can detect rich and lean mixtures. The mechanism in most sensors involves a chemical reaction that generates a voltage. The engine's computer looks at the voltage to determine if the mixture is rich or lean, and adjusts the amount of fuel entering the engine accordingly.

Summary:
No front O2's = the computer not knowing the condition of the air/fuel mixture exiting the combustion chamber = not being able to compensate for any variances = running like ****

Therefore, no front O2's = running like ****

Z28M6TT

^+1. good answer