Wideband permanent install?
#1
Staging Lane
Thread Starter
iTrader: (6)
Join Date: Nov 2006
Posts: 98
Likes: 0
Received 0 Likes
on
0 Posts
Wideband permanent install?
I am about to embark into the tuning "learning pains" for my '98 WS6.
Thanks to Chad's (Green Light Motorsports) help, I ordered an EFI live V2 with and LM-1 wideband.
I went with the LM-1 so I can use it to tune my other cars.
My big question is this: After tuning your car, is it necessary to leave the wideband in? Is it best to leave one in? Is the PCM programmed to adjust AFR by watching the wideband sensor input and disregards the OEM o2 sensors?
Or once it is tuned with a wideband, do we leave it up the PCM to keep the AFR in check through the O2 sensors?
Thanks in advance for any inputs!
Thanks to Chad's (Green Light Motorsports) help, I ordered an EFI live V2 with and LM-1 wideband.
I went with the LM-1 so I can use it to tune my other cars.
My big question is this: After tuning your car, is it necessary to leave the wideband in? Is it best to leave one in? Is the PCM programmed to adjust AFR by watching the wideband sensor input and disregards the OEM o2 sensors?
Or once it is tuned with a wideband, do we leave it up the PCM to keep the AFR in check through the O2 sensors?
Thanks in advance for any inputs!
#2
TECH Resident
Yes you can leave it in the exhaust system.
Some Widebands simulate Narrow bands, so you could let the PCM use the sensor, and read the true WBAFR on the dash. The PCM cant read standard WB signals unless the sensor has a narrow band output.
Its not nessasary to leave the WB sensor in. Just tune the car for WOT runs with the WB sensor and for not WOT conditions the narrow bands will be fine. The Narrow bands are spot on for Stoch (14.6 AFR) the fuel trims will trim it to be pretty good, you may want to log the fuel trims and adjust your VE if its more than 4% out. Search for VE tuning on that.
Some Widebands simulate Narrow bands, so you could let the PCM use the sensor, and read the true WBAFR on the dash. The PCM cant read standard WB signals unless the sensor has a narrow band output.
Its not nessasary to leave the WB sensor in. Just tune the car for WOT runs with the WB sensor and for not WOT conditions the narrow bands will be fine. The Narrow bands are spot on for Stoch (14.6 AFR) the fuel trims will trim it to be pretty good, you may want to log the fuel trims and adjust your VE if its more than 4% out. Search for VE tuning on that.
#4
Staging Lane
Thread Starter
iTrader: (6)
Join Date: Nov 2006
Posts: 98
Likes: 0
Received 0 Likes
on
0 Posts
Thanks!
Thanks for the input!
I figured that was the case. We use the wideband to get the VE table where it should be and then leave the OE o2 sensors to trim the mixture after tuning.
I just thought there may have been a "mode" where the wideband would replace the OE o2 narrowband sensors.
Thanks again!
I figured that was the case. We use the wideband to get the VE table where it should be and then leave the OE o2 sensors to trim the mixture after tuning.
I just thought there may have been a "mode" where the wideband would replace the OE o2 narrowband sensors.
Thanks again!
#7
Staging Lane
Thread Starter
iTrader: (6)
Join Date: Nov 2006
Posts: 98
Likes: 0
Received 0 Likes
on
0 Posts
Wow, now I am back to being confused , LOL
Sorry for my ignorance or lack of tuning knowledge, but are you telling me you can leave a wideband in permanently to take in place of the OE narrowband o2 sensors?
So leaving it in open loop will ignore the OE o2 sensors and actually run off the readings from the wideband?
Please let me know.
Thanks!
Sorry for my ignorance or lack of tuning knowledge, but are you telling me you can leave a wideband in permanently to take in place of the OE narrowband o2 sensors?
So leaving it in open loop will ignore the OE o2 sensors and actually run off the readings from the wideband?
Please let me know.
Thanks!
Trending Topics
#8
Kleeborp the Moderator™
iTrader: (11)
Open loop means no feedback at all...it doesn't listen to the narrow band O2 sensors OR the wideband. That's why I leave mine in at all times...I don't want the feedback to influence the PCM (personal preference). I leave it in full time to monitor it myself...if I don't like what I'm seeing on the gauge, I go out and mess with the VE table some more (which isn't very often).
Sorry for the confusion...
Sorry for the confusion...
#9
Originally Posted by 808ws6
Wow, now I am back to being confused , LOL
Sorry for my ignorance or lack of tuning knowledge, but are you telling me you can leave a wideband in permanently to take in place of the OE narrowband o2 sensors?
Sorry for my ignorance or lack of tuning knowledge, but are you telling me you can leave a wideband in permanently to take in place of the OE narrowband o2 sensors?
Originally Posted by 808ws6
So leaving it in open loop will ignore the OE o2 sensors and actually run off the readings from the wideband?
Please let me know.
Thanks!
Please let me know.
Thanks!
#11
12 Second Club
iTrader: (2)
Join Date: Feb 2004
Location: Front Royal, VA
Posts: 1,011
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by MeentSS02
Open loop means no feedback at all...it doesn't listen to the narrow band O2 sensors OR the wideband. That's why I leave mine in at all times...I don't want the feedback to influence the PCM (personal preference). I leave it in full time to monitor it myself...if I don't like what I'm seeing on the gauge, I go out and mess with the VE table some more (which isn't very often).
Sorry for the confusion...
Sorry for the confusion...
What about race gas, 110 octane?