O2's Won't Cycle at Idle

[haut]

My o2's won't cycle at idle. Started happening a week or so ago. Once it gets warm, it will sit on .02, or a similar low, very lean reading.

o2 sensor is less then 3 month old, and it cycles fine while cruising, and shows me the correct o2 readings at WOT.

Base fuel pressure is at ~45psi.

Any ideas why this is happening?

 

[1LE]

It's cold out. Above 40F, mine works fine. 30-40F it sits at 0.00, below freezing and it sits at 0.90v or so. "It's just the way they are".

 

[haut]

It's cold out. Above 40F, mine works fine. 30-40F it sits at 0.00, below freezing and it sits at 0.90v or so. "It's just the way they are".

Now that I think about it, mine does exactly the same thing.


Thanks