I am trying to get the hang of the sensor abbreviations & all that stuff. I have no idea what an IIRC is , i will check that sensor site & see if I can find that on there. As far as a vaccuum line...I will just go out there & look around again for any line or anything. But since u mentioned the vaccuum lines again. Ty. - This is my 2nd breakdown within 3 weeks. Very frusteratiung. Going now to checkout vaccuum lines.