Fuel/air off
Thread Starter
Teching In
Joined: Mar 2017
Posts: 1
Likes: 0
Fuel/air off my truck has been in the garage for about 2 months having trans and rear work done. Only thing unplugged was o2 sensors when exhaust was removed. After I reinstalled everything,I started my truck and it's running rich..I think,or lean. It's burning my eyes and you can smell the fumes. Prior to this it was running fine. It has been tuned with maf. I'm running just 2 o2 sensors. If it was doing this before I didn't notice. But because it's in the garage I can now. Does this sound like a o2 sensor going bad? No check engine light and no codes. It's a 05 lq9 motor. No mods other than tbss intake. I'm unable to get my tuner here at this time so just trying to troubleshoot this as best as I can. Thanks for any info.
Staging Lane
Joined: Jan 2017
Posts: 67
Likes: 1
sounds like a lot of unburnt fuel.
Any chance the o2 sensor plugs to the PCM got swapped during reinstall?
That will cause the PCM to do all kinds of crazy things since the banks are swapped.
Without some kind of data scan from the vehicle running its hard to do anything but guess at the issue.
Do you have a code reader to get live data? Seeing o2 sensor live data and Short and long term fuel trims will help.
Any chance the o2 sensor plugs to the PCM got swapped during reinstall?
That will cause the PCM to do all kinds of crazy things since the banks are swapped.
Without some kind of data scan from the vehicle running its hard to do anything but guess at the issue.
Do you have a code reader to get live data? Seeing o2 sensor live data and Short and long term fuel trims will help.
