Okay everyone. So just like the title says, when I reach down to turn on the heat or ac, then engine dies. Has any one ever experienced this? Here is my scenario. I Just bought a 1997 xj. It is a 4 liter 4x4. Everything was great, but the coolant was dirty. I drained the old stuff out and put in distilled water and some Priest one Super flush. I drove it around for a couple of hours with the heat on, came home and drained the system. Installed strait distilled water and again drove around. Drained and filled with coolant and distilled water. I hosed everything off in the engine bay, but now, the Jeep runs fine, but as soon as I turn on the heat, the jeep dies? Anyone have any ideas? The heat and blower work, just not the engine?? Thanks!