Bouncy 02 volts

[dokovski_racing05]

Have bouncy 02 volts on my powerlogger, changed the 02 but still happening. Running the heated sensor with adapter. Does this during idle and driving no difference, any input appreciated.

 

[joed]

Looks exactly as a stock O2 should. Constantly high then low. Cross counts.

 

[OKTurbo]

I agree. Looks normal for a stock narrow band O2 sensor at idle / part throttle. They are basically switches that go from rich to lean to rich to lean as the computer adjusts fuel injector pulse width to get the target air/fuel ratio.

You need a wide band 02 setup to really be able to tune for performance.

 

[dokovski_racing05]

Just making sure, thought they were supposed to be stabilized. Not bouncy like that

 

[OKTurbo]

The O2 millivolts will stabilize more at WOT. They're always moving at idle. As a matter of fact, if they're stable at idle it tells you that you have a bad / lazy O2 sensor.