2.5dse no 4 injector

hiya,leak off pipes changed,new glow plugs,timer relay.good fuel flow,no joystill have starting probs.i,m now looking at possible sensor probs,now i,m no electrical wizzo but will disconnecting the no4 injector or coolant sensor throw up any bcem faults leaving me thinking why the fook did i do that.

hi ive unplugged no 4 injector and all the coolant sensor before with the battery connected and disconnected and have never had any gremlin faults with the becm . good luck mate