earlier today I started it up and everything sounded fine. drove it about 5-10 miles and as I was going up a hill I downshifted to 1st then to 2nd and soon as i hit 2nd it started to die and stalled on me. I pulled off and can't get it to get started. It doesn't sound like its the started because it still turns off just won't actually start. I thought maybe the fuel pump but not sure. earlier i didn't get a chance to listen and see if i heard the fuel pump kick on but someone told me the fuel pump is in the gas tank? its a 1990 6cyc 3.0 any ideas would be great please