Even when I am sitting in park. When I first start the car, it will run for about 15/20 sec then shut-off, but everytime I depress the brake petal, it runs for about 1/2 secs.

Bad pump? Bad Accumulator?

Any thoughts would be helpful.

ETA 1996 RR 4.0

 

Any Luck, I have the same problem on a 92 classic?

 

bad accumulator, not holding a reservoir of the press you need. as for the classic, too old for me man, but pretty sure it has the same basic setup, but its an expensive guess there... roveroh, you need to see if you have a good pedal on the first press after it srops running, if so, its the accum., if not, youre looking at other issues too