I had a similar problem with my 98 Trooper  diesel, car would run  for a few
minutes then cut out. It was due to air in the fuel system.

It turned out to be a pin hole in the fuel pipe letting in air. In my case
as it left the fuel tank.
I seem to remember ( and you do this at your own risk) that because I was
having problems pulling fuel through using the hand pump (because it was
sucking in air in prefereence to diesel I found out later), I used a small
12V Tyre compressor attached via a fitment for blowing up airbeds to pipe
for returning excess fuel to the tank to slightly pressurise the system and
push fuel through the feed pipe to the fuel filter. If there is a leak a
leak in the pipes you will see fuel coming out or hear air escaping.Great
care needs to be taken that there is no risk of the fuel igniting especially
with sparks or a hot exhaust pipe.

REMEMBER I WAS DEALING WITH DIESEL. PETROL IS MORE VOLATILE.