Do I need my O2 sensors?

fivemustangs

Member

Dec 22, 2007

222

0

17

Bar Harbor, Maine

Jun 23, 2010

#1

• Jun 23, 2010

• #1

Hey! I am currently doing a t5 swap in my 91 GT and noticed when i was under the car that the previous owner disconnected the O2 sensors, because the starter was in the way of one of the sensors. My question being, should I weld in a new bung and replace the sensors? Or should I leave them off? I did some searching and got mixed reviews, I just want this car to feel like it has a bunch more balls, then before I dropped my slipping AOD.
Thanks!

 

oz

Founding Member

Jun 29, 2000

1,079

10

58

Plymouth, MI

Jun 23, 2010

#2

• Jun 23, 2010

• #2

If you're fuel injected you need them.

They provide feedback to the computer which it uses to adjust fuel flow (mixture)... without them - frankly, I'm surprised it runs.

If you're running a carb, no, you don't need them.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

34

129

Jun 23, 2010

#3

• Jun 23, 2010

• #3

Without them it should run pretty rich.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,297

18,002

224

Massachusetts

Jun 23, 2010

#4

• Jun 23, 2010

• #4

Yes you need them.

 

fivemustangs

Member

Dec 22, 2007

222

0

17

Bar Harbor, Maine

Jun 27, 2010

#5

• Jun 27, 2010

• #5

Well that solves that. I put them on today and imagin that......The car runs better! Thanks guys!

 

N

njoliver

Member

Nov 25, 2009

259

0

17

Columbus OH

Jun 27, 2010

#6

• Jun 27, 2010

• #6

your fuel mileage will be a ton better to