Yesterday was a fun day for me. We went out of town to see my aunt who was in the hospital. Pull into the parking garage and see engine temp go through the roof and steam come from under the hood. Come to find out it was a heater core line. And...nobody had it in stock. We bypassed the original line and put in a rubber heater core line, and it is working good. One small problem, when we turn the heat on while at idle, the engine would die. At least we were able to get home(hospital was more than an hour away.) This morning we get out to look it over some more and after fiddling around, when we turn on the heat, it does not kill the engine any more. Now it only dies at idle when I turn on the AC. At highway speed when I turn the heat on, engine stalls out a little bit but does not die. Any ideas? Thanks for looking!