Speedo has just stop working :-(, And getting fault codes 22 and 33 car also boost cut as well just after, is this the car going into limp mode ?, On a 1996 wrx, Also when I disconnect the grey wire on the right hand side of the dials the car runs real well as soon as I connect it it don't .

 

22 is knock sensor and 33 is the vehicle speed sensor. You could try resetting the ecu using the plugs and seeing what comes back. the speedo not working will cause the car to go into limp mode. not sure what grey wire you mean tho.

 

Won't let me do a reset run through the process and it flashers 33 as I'm driving, on the back of the dials you have 3 wires 2 grey and one blue it's the right hand one that is doing it!?.