Alright so here's the deal I have a nice little vacuum leak causing my idle to jump aroune between 1k and 1300rpms. I recently broke this line (the red one): I broke this line by accidentally leaning on it and it snapped. while running i can feel that it is pulling vacuum from the plenum side. my major question is what is this line? it might be a stupid question but I just dont know the answer. also i re connected the broken ends together with a small length of vacuum hose and it still acts like there is that vacuum leak. Do you think that a vacuum hose holding it together would be able to hold vacuum? if not do you think some silicon would hold it together and hold vacuum until I get the extra time to replace the line? help please this is the one thing that is stopping my engine froom running perfectly and its bothering me!