- Jul 22, 2015
- 2,724
Happy to report that I've finally got my short- and long-term fuel trim issues resolved. But my upstream bank 1 sensor is still 'lazy' - here's a Torque screencap (oh, and the upward spike on the left is from me raising the RPM a bit to observe voltage changes):
Metrics (after 75-100mi and a few drive cycles): (6.0L LQ4, 235K)
- STFT ranges from 0% to -7%, usually in the negative 3-ish range.
- LTFT is 0% (dunno how long that'll last, but for now, that's as good as it gets)
- No codes whatsoever (lit or pending)
- Oil control and coolant levels are solid on this engine (so no fear of sensor contamination)
(I did note a little oil surrounding the gasket / intake ports when I removed the intake again; apparently, that's from the PCV system, and gives reason to put a catch can in... which I'll do in the spring)
- Slight ignition miss I had before repairs is now gone. Engine runs beautifully, great oil pressure, etc.
Question: Would you be in a rush to replace the two primary O2 sensors, if you were planning to leave for a long (3500 mi / 3mo) trip with the truck, towing about 6000 lbs?) Trying to get out of here before the snow starts falling (although I'm waiting for my SoS to send my renewed D/L in the mail, so I can't leave 'today', anyway).
I know if I touch the sensors, I'll run into issues (because I always have 'issues', when I repair something.) Like breaking off the sensor in the threaded bung. Or not being able to remove it. Those kind of 'issues'.
Info I have is that if things are running as well as they are, it shouldn't be too much of a concern. But I know if the B1 sensor goes, my cat on that side is at risk (and I'll be far from home)
As far as how long this B1 sensor has been 'lazy'... probably since I've had the truck (about a year now)
Metrics (after 75-100mi and a few drive cycles): (6.0L LQ4, 235K)
- STFT ranges from 0% to -7%, usually in the negative 3-ish range.
- LTFT is 0% (dunno how long that'll last, but for now, that's as good as it gets)
- No codes whatsoever (lit or pending)
- Oil control and coolant levels are solid on this engine (so no fear of sensor contamination)
(I did note a little oil surrounding the gasket / intake ports when I removed the intake again; apparently, that's from the PCV system, and gives reason to put a catch can in... which I'll do in the spring)
- Slight ignition miss I had before repairs is now gone. Engine runs beautifully, great oil pressure, etc.
Question: Would you be in a rush to replace the two primary O2 sensors, if you were planning to leave for a long (3500 mi / 3mo) trip with the truck, towing about 6000 lbs?) Trying to get out of here before the snow starts falling (although I'm waiting for my SoS to send my renewed D/L in the mail, so I can't leave 'today', anyway).
I know if I touch the sensors, I'll run into issues (because I always have 'issues', when I repair something.) Like breaking off the sensor in the threaded bung. Or not being able to remove it. Those kind of 'issues'.
Info I have is that if things are running as well as they are, it shouldn't be too much of a concern. But I know if the B1 sensor goes, my cat on that side is at risk (and I'll be far from home)
As far as how long this B1 sensor has been 'lazy'... probably since I've had the truck (about a year now)