o2 sensors prob?

[splitfinger09]

So I just replaced my o2 sensors like 3 months ago. Now my car seems to be having the same trouble again. In first gear it jerks and sputters. I have headers an ls6 manifold and a frost mail tune. Im not throwing any codes yet but theres def a problem. Its like the power just cuts out in the lower rpm range and then at higher speeds it stays steddy. what do you think could cause my o2 sensors to go bad so soon, if thats even the problem. Thanks

[Hi-Po]

What sensors did you go with? The 13111's have been known to give quite a few people problems, while others say they are good.

Kinda a crap shoot without any codes, any o recent work performed on the car?

[Frost]

Jerks and studders are either misfires or very lean conditions. My base MAF curve is about 7% RICHER than stock... but if the MAF has aged poorly it could be reporting low. You can always unplug the MAF (car will set SES light and fail into speed density) and drive for about 10 minutes after the car is fully warm (let any trim learning adapt to the SD arrangement) and see if the problem is gone.

Past that, there isn't really enough here to make any kind of solid diagnosis. If you are having O2 problems though, they more than likely fail from rich running after misfires than anything else.