This is a tough one as it could be a number of things related to either fuel delivery, (ie bad pump) or ignition related issues. In my case, my '98 S70 started to intermittenly stall while driving. Sometimes it would restart, other times it would not. After weeks of trying to diagnose, I had my mechanic make a 'road call' the last time it stalled & would not restart. Turned out to be the ignition module which he replaced & car is running great now
Out of gas
1998 that when
car starts but shut off while driving
Ford f350 super duty shut off and lose power while driving
If a 1998 Oldsmobile 88 is shutting down after being driven for a while, the vehicle may have a problem with the computer. Something is telling the computer that the vehicle needs to be shut off. A new computer might fix this problem.
If by shut off you mean stall, your ETM needs either cleaning or replacing
One of the main causes for a 1998 Buick LeSabre to die while driving is a problem with the computer. The computer might tell the fuel pump to shut off and stop sending fuel to the motor.
If you lost power while driving it could be the alternator. Its not charging your batter anymore
Possible a bad or corroded ground cable .
no gas
Probably the alternator.
Peeing off the side