I am having the same issue. I have a 1996 eclipse that was running fine for a week or so. I was driving it and around the block and it did fine. It did spring a exhaust leak right at the flex tubing after the 90 degree under the engine. Now for some reason I can crank it up just fine. and it will run for about 5 minutes until warm right at under halfway on the temp gauge. and then it sputters out. It will re crank right away and die immediately. Seems to me that if it cranks but dies fuel and fire are good. I do not hear any vacuum leaks but that is my forst thought.. Any ideas?