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no o2???

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Old Apr 19, 2003 | 08:00 PM
  #1  
Black91Z28's Avatar
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From: Nebraska
Car: 1991 Camaro z28
Engine: 350 Tpi
Transmission: 700r4 Auto
no o2???

what happens if u have no o2 sensor hooked up to ur headers?? anything bad?
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Old Apr 19, 2003 | 09:31 PM
  #2  
25THRSS's Avatar
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From: Glen Allen, VA
Car won't go into closed loop and will run pig rich all the time.
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Old Apr 20, 2003 | 12:48 AM
  #3  
Black91Z28's Avatar
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From: Nebraska
Car: 1991 Camaro z28
Engine: 350 Tpi
Transmission: 700r4 Auto
is that true? any other thoughts?
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Old Apr 23, 2003 | 09:13 PM
  #4  
racing_dude_17's Avatar
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From: Lufkin,TX
never mind
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Old Apr 23, 2003 | 09:22 PM
  #5  
87Formula4bbl's Avatar
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Joined: Jul 2002
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From: Toledo, OH
Car: '87 Formula
Engine: 350
Transmission: Auto
It will run totally rich ALL THE TIME, and VERY rich at that, just like 25thrs said, trust me. I can't even imagine what it would do to a FI car, mine was carbed and it ran that way...Got it fixed tho so shouldn't have any more problems with that.
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Old Apr 24, 2003 | 03:19 PM
  #6  
VILeninDM's Avatar
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From: Rochester, NY
Why do you need O2 sensor when you have a carb? Were you using q-jet(some say it is computer-controlled, some say it isnt)? Do you need O2 if you nave non-ECM carb like Holley?
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Old Apr 24, 2003 | 03:37 PM
  #7  
Berlinetta00's Avatar
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From: Washington State
Car: '84 Berlinetta
Engine: ZZ4
Transmission: BTOD stage 3
Axle/Gears: 3.23 posi disc
For a non-cc system (edelbrock, holley and the like) you can rip them out, run them over, blend them into your favorite person's breakfast shake and watch them eat it without complication (to your car anyways ). If you have a computer controlled quadrajet on there, you will run rich if you follow the above procedure, and the check engine light will most likely come on. For a FI car (TBI, MPI, CFI) it is not advisable in the least bit to run without an O2 sensor for any length of time.

The reasoning behind this is the computer in a computer controlled engine (weather it is carb or FI) uses the O2 sensor to determine how rich the engine is running to obtain maximum economy or performance (depending of how far the pedal is pressed to the floor ). Non computer controled systems do not have this added capability or weight, commonly refered to as a computer, so they lack a need for the O2 sensor unless the driver wants an Air/Fuel ratio gauge for him or her self. The carb adjusts to the vaccum of the engine and accordingly dumps the right amount of fuel and air into the intake. The "right" ammount is set by you or your local mechanic by what jets are used and what float levels are used and what.... ect. ect.

Anyhow, you get the point.
Hope this helps,

Last edited by Berlinetta00; Apr 24, 2003 at 03:46 PM.
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Old Apr 24, 2003 | 04:21 PM
  #8  
VILeninDM's Avatar
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From: Rochester, NY
That does help a lot. I was pretty much guessing the same thing, but is always good to hear it from someone who actually knows what he is talking about.

Thanks
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