LT1-LT4 Modifications 1993-97 Gen II Small Block V8

bad o2???

Thread Tools
 
Search this Thread
 
Old 02-26-2013 | 10:00 PM
  #1  
teal94z281989's Avatar
Thread Starter
On The Tree
 
Joined: Jan 2013
Posts: 111
Likes: 0
From: honey brook,pa
Default bad o2???

ok so i was using tuner pro rt and at idle the left o2 is reading from 50-700 and the right o2 is reading 950-972. so my question is, is my right o2 bad?
Old 02-26-2013 | 10:02 PM
  #2  
OnyxY2KSS's Avatar
TECH Apprentice
 
Joined: Nov 2003
Posts: 309
Likes: 0
From: Houston, Tx
Default

Easiest test would be to swap right to left & left to right to see if the output follows.
Old 02-26-2013 | 10:09 PM
  #3  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 7
From: South Jersey
Default

A properly functioning O2 in closed loop should fluctuate wildly from high to low (.100-.900).

Only in open loop will they read steady as they are still warming up.
Old 02-26-2013 | 10:15 PM
  #4  
teal94z281989's Avatar
Thread Starter
On The Tree
 
Joined: Jan 2013
Posts: 111
Likes: 0
From: honey brook,pa
Default

car was warmed up with these results, so my right is bad? im getting like 13mpg could this be the reason?
Old 02-27-2013 | 07:31 AM
  #5  
Ed Wright's Avatar
9-Second Club
iTrader: (1)
 
Joined: Feb 2002
Posts: 3,397
Likes: 8
From: Tulsa, OK
Default

Originally Posted by OnyxY2KSS
Easiest test would be to swap right to left & left to right to see if the output follows.
Only sensible way to test it.
Old 02-27-2013 | 08:21 AM
  #6  
teal94z281989's Avatar
Thread Starter
On The Tree
 
Joined: Jan 2013
Posts: 111
Likes: 0
From: honey brook,pa
Default

Ok so I'm gonna switch them and see what happens if the readings follow the 02 then its bad correct?? Also on tuner pro Rt what does cylinder ID mean? Thanks for the help guys I'm new to this and if I can't find the question on google I come here haha. U guys are Awsome and help out alot. Again thanks
Old 02-28-2013 | 12:42 PM
  #7  
teal94z281989's Avatar
Thread Starter
On The Tree
 
Joined: Jan 2013
Posts: 111
Likes: 0
From: honey brook,pa
Default here is a screen shot of my readings from tunerpro rt

can someone let me kno if eveything looks ok, also the right o2 didnt move much from that number this was closed loop.
Attached Thumbnails bad o2???-screenshot_2013-02-27-14-07-32.jpg  
Old 03-03-2013 | 01:31 AM
  #8  
musclehead's Avatar
TECH Apprentice

iTrader: (2)
 
Joined: Jul 2004
Posts: 343
Likes: 0
From: Cypress, Ca
Default

Originally Posted by RamAir95TA
A properly functioning O2 in closed loop should fluctuate wildly from high to low (.100-.900).

Only in open loop will they read steady as they are still warming up.
As stated above you have a bad O2 sensor. Low voltage represents a lean condition while high voltage represents a rich condition. If you are at 950 and not fluctuating then you are dumping a lot of fuel and getting horrible gas mileage not to mention your catalytic convertor is going to become destroyed soon. I recommend you replace both O2 sensors. Reason being you want both sensors reacting/fluctuating at the same rate for the optimal air fuel ratio which affects gas mileage and performance.
Old 03-03-2013 | 06:10 AM
  #9  
96capricemgr's Avatar
11 Second Club

iTrader: (1)
 
Joined: Sep 2004
Posts: 11,975
Likes: 13
Default

Did you swap side to side yet?
a stuck injector could dump fuel and have an O2 reading like that correctly..
Swapping the sensors from side to side gives you a simple free way to check.



Quick Reply: bad o2???



All times are GMT -5. The time now is 10:59 AM.