o2 sensor BIZARRE issue!!
08-10-2011, 08:54 PM
#1
Staging Lane
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o2 sensor BIZARRE issue!! I recently picked up a cammed 01 Z06 and I'm in the process of changing the longtube headers out to some nicer ones. So here's my problem.
I took out the front o2 sensor on the driver side and it's normal. When I came to take out the passenger side o2 sensor, I traced the wire along the heat shield and it turns out to be completely ripped off with bare wires everywhere. The ripped up wires were tucked under the heat shield neatly so whoever did it, did it purposely. I look for the harness near the header and I find it completely melted. No wonder why nothing is plugged in right?
The bizarre thing about this is that I've had the car for 2 months and haven't had a single code pop up. How on earth can it run normally with just one o2 sensor? I get around 30mpg on the highway and the car is extremely powerful.
Does anyone have a clue on what is going on here? How come no codes, no issues, can the FRONT o2s be tuned out?
Any help is greatly appreciated
Thanks
Adham
I took out the front o2 sensor on the driver side and it's normal. When I came to take out the passenger side o2 sensor, I traced the wire along the heat shield and it turns out to be completely ripped off with bare wires everywhere. The ripped up wires were tucked under the heat shield neatly so whoever did it, did it purposely. I look for the harness near the header and I find it completely melted. No wonder why nothing is plugged in right?
The bizarre thing about this is that I've had the car for 2 months and haven't had a single code pop up. How on earth can it run normally with just one o2 sensor? I get around 30mpg on the highway and the car is extremely powerful.
Does anyone have a clue on what is going on here? How come no codes, no issues, can the FRONT o2s be tuned out?
Any help is greatly appreciated
Thanks
Adham
08-11-2011, 11:23 PM
#5
O2 sensors don't work properly with LT's because they're moved too far downstream and the exhaust is too cool to give proper readings. So they can be sending bad feedback to the PCM that causes fueling to be thrown off. Plus they tend to throw codes constantly.
Running open loop commands fueling from the AFR tables. You set your fueling tables where you want and then work with a wideband sensor to insure that your AFR is as commanded and you're done.
Running open loop commands fueling from the AFR tables. You set your fueling tables where you want and then work with a wideband sensor to insure that your AFR is as commanded and you're done.
08-13-2011, 08:07 PM
#6
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O2 sensors don't work properly with LT's because they're moved too far downstream and the exhaust is too cool to give proper readings. So they can be sending bad feedback to the PCM that causes fueling to be thrown off. Plus they tend to throw codes constantly.
Running open loop commands fueling from the AFR tables. You set your fueling tables where you want and then work with a wideband sensor to insure that your AFR is as commanded and you're done.
Running open loop commands fueling from the AFR tables. You set your fueling tables where you want and then work with a wideband sensor to insure that your AFR is as commanded and you're done.
It doesn't seem like a popular choice according to some of the threads I was reading....my car runs fine though
08-13-2011, 08:38 PM
#7
O2 sensors don't work properly with LT's because they're moved too far downstream and the exhaust is too cool to give proper readings. So they can be sending bad feedback to the PCM that causes fueling to be thrown off. Plus they tend to throw codes constantly.
Running open loop commands fueling from the AFR tables. You set your fueling tables where you want and then work with a wideband sensor to insure that your AFR is as commanded and you're done.
Running open loop commands fueling from the AFR tables. You set your fueling tables where you want and then work with a wideband sensor to insure that your AFR is as commanded and you're done.
