A bad fuel pressure regulator will cause the car to stall or not run .
A leaking fuel pressure regulator is the most common cause for a rich condition on the Olds Aurora 4.0L V8. -------------------------
Follow the rail line that runs to the injectors. You will find the pressure regulator.
This means the engine is running extremely rich. This can be causes by a leaking fuel pressure regulator or a stuck open injector.- TechJK ------------
The voltage regulator is internal to the alternator. TechJK ------------------
My car did the same had fuel pump replaced twice finally found out it was the fuel pressure regulator
Did you change the fuel filter? Have you checked the fuel pressure regulator?
check your fuel pressure regulator, it could be leaking http://flickr.com/photos/thatguyfromcchs08/2233062257/
under rear seat
The low pressure service port for the AC on a 1998 Olds Aurora is located on the side of the accumulator. It is at the back of the engine compartment, on the passenger side.
Check the fuel pressure regulator or the vaccum line to it If you have to have the gas peddle pushed all the way to the floor to start it that is a for sure sign
frame rear passenger side