hi ive still got the front cat in line the rest is decated on my import wrx but the sensor isnt connected as the wire is broke off will this make any diffrents to power etc the sensor is rite next to the turbo but on my other wrx is down the bottom,

 

it will just run the base fuel map at idle and cruise rather then run closed loop with feedback from the sensor.
the lambda is not used above approx 3,000rpm and 0psi boost.
it will run fine but maybe not well enough to get through an MOT though.

 

hi thanks for that mate, also it dont seem to boost and kick in much would this effect the boost or not as i havnt fitted a boost gauge yet so im not sure what its boosting at,