I have a 95 disco 3.9. I live in colorado and it was the coldest night my disco has ever seen. It was runnning fine yesterday but this morning it wouldn't start. I jumped it and it started for a moment then died. This problem repeated and when it did run it sputtered and died. On the first crank it sounds normal, goes to normal idle, but then dies. I put heet in the gas and even put octane boost via rovers north advice. still will not run. Any advice? Fuel pump? fuse? relay? thanks crowbar