STFT verses 02 Volts
#1
TECH Junkie
Thread Starter
Join Date: Jan 2003
Location: Fresno/Chico
Posts: 3,427
Likes: 0
Received 0 Likes
on
0 Posts
STFT verses 02 Volts
I installed my autometer O2 gauge last night and when I tested it verses my scan tool the gauge appears to be reading STFT. It was my understanding that the 02 gauge was sort of a volt gauge reading the millivolts the 02 sensor puts out? Right? If this is true then why/how is the gauge reading matching my STFT?
P.S. my 02 volts are at .6xx under normal driving. I dont want to test nitrous until I better understand my STFT verses 02 Volts dilemma.
P.S. my 02 volts are at .6xx under normal driving. I dont want to test nitrous until I better understand my STFT verses 02 Volts dilemma.
#2
TECH Resident
iTrader: (2)
Join Date: Feb 2004
Location: San Diego
Posts: 765
Likes: 0
Received 0 Likes
on
0 Posts
I sure as heck hope your not using a narrow band O2 to tune anything. You'll surely be running wrong because a 1V sensor does not have the resolution nor speed to adjust to constant changes in the A/F.
Unfortunatey I cannot answer your question as to how STFT relates to a narrow band A/F reading. I'm new to the GMC world and am not edumacated in the GM PCM terms yet.
Unfortunatey I cannot answer your question as to how STFT relates to a narrow band A/F reading. I'm new to the GMC world and am not edumacated in the GM PCM terms yet.
#3
TECH Junkie
Thread Starter
Join Date: Jan 2003
Location: Fresno/Chico
Posts: 3,427
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by unredeemed
I sure as heck hope your not using a narrow band O2 to tune anything. You'll surely be running wrong because a 1V sensor does not have the resolution nor speed to adjust to constant changes in the A/F.
Unfortunatey I cannot answer your question as to how STFT relates to a narrow band A/F reading. I'm new to the GMC world and am not edumacated in the GM PCM terms yet.
Unfortunatey I cannot answer your question as to how STFT relates to a narrow band A/F reading. I'm new to the GMC world and am not edumacated in the GM PCM terms yet.
I am not doing any tuning just scaning. What i dont understand is why my O2 fuel trim matches my gauge but my O2 voltage does not move out of the .600 range
#4
TECH Resident
iTrader: (2)
Join Date: Feb 2004
Location: San Diego
Posts: 765
Likes: 0
Received 0 Likes
on
0 Posts
well people were tuning with narrow bands because the price of a wideband was cost prohibitive. Now you can get a wideband setup with sensor for under $500. Try and do that 5 years ago.
However what a 1V sensor is good for is to check for stoich operation for part throttle driving. That is about all it's good for. Well that, and the fancy light show.
However what a 1V sensor is good for is to check for stoich operation for part throttle driving. That is about all it's good for. Well that, and the fancy light show.
#5
TECH Junkie
Thread Starter
Join Date: Jan 2003
Location: Fresno/Chico
Posts: 3,427
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by unredeemed
what a 1V sensor is good for is to check for stoich operation for part throttle driving.
Thread
Thread Starter
Forum
Replies
Last Post
Fast86z
GM Engine & Exhaust Performance
4
08-23-2015 12:35 AM
Zick
Tuning, Diagnostics, Electronics, and Wiring
10
09-23-2005 10:38 AM