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o2 sensor help. Check Log

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DoctorMofo

15+ Year Contributor
57
1
Jun 25, 2005
South Milwaukee, Wisconsin
Ok I was logging my car and my o2 volts hop around like crazy from .09 to .90 and all in between. I dont understand why it is doing ths does anyone have a idea? My car is bone stock. This is just a idling log after a light drive.

TIMA FTRL FTRM FTRH FTO2 O2-R INJP
14° 83.5% 117.8% 94.4% 99.1% 0.14V 2.05ms
13° 83.5% 117.8% 94.4% 106.9% 0.23V 2.05ms
14° 83.5% 117.8% 94.4% 108.4% 0.60V 2.05ms
15° 84.2% 117.8% 94.4% 98.3% 0.72V 1.79ms
14° 83.5% 117.8% 94.4% 88.1% 0.55V 2.05ms
16° 83.5% 117.8% 94.4% 92.0% 0.25V 2.05ms
14° 83.5% 117.8% 94.4% 99.8% 0.16V 2.05ms
13° 83.5% 117.8% 94.4% 107.6% 0.29V 2.05ms
14° 83.5% 117.8% 94.4% 102.2% 0.76V 1.79ms
14° 83.5% 117.8% 94.4% 92.8% 0.70V 1.79ms
15° 83.5% 117.8% 94.4% 85.0% 0.47V 2.05ms
15° 83.5% 117.8% 94.4% 92.0% 0.23V 2.05ms
14° 82.7% 117.8% 94.4% 99.1% 0.23V 2.05ms
14° 83.5% 117.8% 94.4% 106.1% 0.49V 2.05ms
13° 83.5% 117.8% 94.4% 99.1% 0.72V 1.79ms
14° 83.5% 117.8% 94.4% 90.5% 0.59V 1.79ms
14° 82.7% 117.8% 94.4% 92.8% 0.29V 2.05ms
14° 82.7% 117.8% 94.4% 99.8% 0.20V 2.05ms
17° 82.7% 117.8% 94.4% 106.9% 0.41V 2.05ms
13° 83.5% 117.8% 94.4% 97.5% 0.76V 2.05ms
14° 82.7% 117.8% 94.4% 91.3% 0.45V 2.05ms
12° 82.7% 117.8% 94.4% 97.5% 0.23V 2.05ms
12° 82.7% 117.8% 94.4% 105.3% 0.18V 2.05ms
11° 82.7% 117.8% 94.4% 111.5% 0.27V 2.05ms
12° 83.5% 117.8% 94.4% 114.7% 0.60V 2.05ms
12° 83.5% 117.8% 94.4% 106.1% 0.74V 2.05ms
12° 83.5% 117.8% 94.4% 99.1% 0.72V 2.05ms
14° 83.5% 117.8% 94.4% 92.8% 0.47V 2.05ms
12° 83.5% 117.8% 94.4% 96.7% 0.20V 2.05ms
12° 82.7% 117.8% 94.4% 99.8% 0.14V 2.05ms
13° 83.5% 117.8% 94.4% 103.0% 0.12V 2.05ms
12° 83.5% 117.8% 94.4% 106.1% 0.14V 2.05ms
12° 83.5% 117.8% 94.4% 109.2% 0.12V 2.05ms
13° 84.2% 117.8% 94.4% 112.3% 0.16V 2.05ms
12° 84.2% 117.8% 94.4% 116.2% 0.37V 2.05ms
13° 84.2% 117.8% 94.4% 118.6% 0.53V 2.05ms
13° 84.2% 117.8% 94.4% 113.9% 0.68V 2.05ms
12° 85.0% 117.8% 94.4% 108.4% 0.70V 2.05ms
14° 85.0% 117.8% 94.4% 103.0% 0.57V 2.05ms
15° 85.0% 117.8% 94.4% 103.7% 0.33V 2.05ms
14° 85.8% 117.8% 94.4% 106.9% 0.18V 2.05ms
 
silly man :p, o2's are supposed to do that. If you're idling, with no load (out of gear), your o2 readings SHOULD oscillate back and forth, just like they're doing. If they don't do ANYTHING, then you have a problem. Also, to check that you're o2 sensor (I'm assuming you're taking bank1 sensor1 readings) is functioning correctly, log a WOT run. As soon as you hit WOT (or close) your o2's should hover in a plateau anywhere from .85V to 1.00V (depending on your tune). the point is, the bank1sensor1 o2 reading should be at a constant during WOT acceleration.
 
Oh well I figured something is wrong because when I boost it, the car hesitates and kinda chugs or studders. I replaced the plugs and wires. I removed the little plastic piece inside the bcs and it is boosting 15psi. Could the bov be leaking? Would a leaking bov do this? I checked for leaks and didnt find any. But with my boost guage i am only reading about 15-16 vac and if I rev it and let off then it goes to about 18 for a little bit but slowy goes back to 15-16. So I am guessing I have a leak somewhere but I didnt find any.
 
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