172 de cat, before i begin there is no starting/power/revving issues, it has poor mpg imho and there is a strong smell of petrol, after being under the car and checking the exhaust i have noticed the post oxygen sensor on decat pipe has been plugged with a suitable bolt, the pre cat 02 sensor is there, however, following the wires into the engine bay there is nothing to plug it into, it is a 4 wire sensor
, there is no standard airbox on car (maybe it plugs into there?) as it has an induction kit, all in all this means that the pre cat 02 sensor i have on the car is not plugged in as i cant see anywhere to plug it into 
Would be grateful of any help.
Thanks
Would be grateful of any help.
Thanks
