I have a 1991 ford explorer with 153,000. Its been driven 8,000 miles the past 5 years.. I just drove it down to ca from wa and it ran great, now that its back the caliper decided not to release on front right and the fuel pump went.. after i fixed that it is now deciding not to run when it gets warmed up.. it starts great and runs great for about 5 miles then all the sudden dies.. my question is what would cause it to die out of the blue when its warm and not start back up until its cooled down????