[bushwhacker]

Had exactly the same problem. Sometimes I would drive a couple miles and the engine would just die, somtimes a couple hundred miles and kazamm! it would happen again, I would sit for awhile on the side of the freeway and it would start up, pull onto the freeway again and Bingo! it would stop again.
First the in line fuel filters wre checked, then we changed out the fuel pump,
then put in a new coil.....zip..the same thing happened again, all of this over a period of a couple months. Finally pulled the MSD and sent it back to the factory to be checked..........ta da! that was it ....they found a short in the MSD box. We replaced it and it's perfect....problem solved! ......p.s. also relocated the box as well......hope this helps............Bush.