Ok i tested my mixture through the x11 conector. What i got was this.

4 volts key on engine off (70%ish duty cycle)

start at idle. 6.8 - pinned. (50%ish) duty cycle
increase revs - fluctuates between 6.8 and about 7.8

leave at idle - increases after 10 seconds to 11.2 volts.
You rev, the motor stutters and you get 6.8 volts, only to have it slowly rise to 11.2 volts again.

Disconected the o2 sensor. stayed a at 6.8 and when reved increases to 7ish then drops again, didnt rise to 11.

What i get from this is i need a new o2 sensor

correct?