o2 sensor bad or something else

[Flybiyou]

I took out a air fuel (blinky light) gauge I had to replace it with a oil pressure. Before I took it out It never read unless I was somewhere around 3100 to 3400 rpms. I did work fine before the motor blew. I put in the 6-bolt and since it has been doing this. I did the blue wire mod on my afc so you can read the o2 volts and it reads 0.010 to0.015 at idle and any other rpm besides 3100 and 3400 then it reads 0.200 to 0.700. Is my o2 dead or do I have other problems. One last thing when I was checking to see what it reads at crusing speed my down pipe came loose from the turbo then the volts read 0.600 to 0.900
through any rpm. Went home and tighten everthing up and it went back doing the same thing. So confused. I tried another 02 senor that came with the 6-bolt i bought and same thing happened. Any thoughts.
Thanks
aj

 

[zxdude]

yeah im having the same issues.... my O2 is brand new... and my ECM is pulling code 11 for that sensor.... my car will barely stay running when cold... and my logger acts like it not rerading anything... the engine is a fresh rebuild with about 100 miles on it...

 

[Flybiyou]

Werid isint it I cant seem to pin point the problem. THe car stays running when its cold out but my gas milage sucks and I just want to figure it out cause its driving me nuts. Does anyone know what the ecu is thinking when there is no 2nd o2 and the front one is not reading