I have an autometer o2 gauge and i notice recently is started to run in the lean area. Now its not a wideband but i figure it would tell me a little bit about whats going on. So i hooked it up to the laptop and noticed that one side is running leaner then the other. Why would there be such a dig difference between the two? The first picture is at idle



The second picture is 2000 rpms



notice the the Lterm percentage. Thank you

 

I am at work so the pic is blocked but...

A few reasons for one side leaner than the other here can be
1. Injector problems (partial blockage)
2. Ignition miss (wires, cap, rotor, plugs...)
3. Exhaust leaks
4. Vacuum leaks
5. Tune (if touched)
6. O2's
7. EGR

These are the ones to eliminate first. O2's I just saw one that warmed and tracked to low ~4 as it heated but was 'open' and caused car to indicate 'lean'. I say indicate because the bank with bad o2 will actually be rich because the o2's read oxygen and our systems do not record miss so a miss is lean.

No gas burnt is lean therefore ECM sends more fuel...

 

sorry, but i don't think microsoft support center will help you with this situation...
haha sorry, i saw the opportunity so i took it. maybe your 02 is simply faulty?

 

haha yea that only halped me figure out how to take a picture of my screen. I will check around for some leaks first. Car seems to run great but when i saw it lean on the gauge i dont want something to break.

 

very smart man. it's not very often when you catch a problem before it starts, but you seem to be WELL on top of it!