1997 TJ, 4L, Auto - Hoping you can help me. The Jeep starts up great but about 5 minutes into driving (about when it reaches operating temp) the electrical systems quits. 1/2 second later it comes right back on and runs fine for the rest of my driving. If I'm going 50 mph it's like a quick bump. If I'm idling it will stall and will start right back up. It happens ever time during warm up. What the heck is it? Thanks for the help.