Well that could cause a run away. I would be really carefull about feeding a diesel engine a potential supply of oil like that.
I am just speculating about the temp sensor, I couldn't exactly figure out what is controlling the air intake and the egr. Somehow the MAF is worked into this as well, in that black box known as the ECU. My friend doesn't have an FSM, I need to talk him into one.
I think it can be done, you just have to know how this engine works inside and out to figure it out.