Even Deader Cougar in the driveway

[Mesa]

My daughters Cougar has died. She topped the car up at a servo but a little over 10kms down the road the car began running rough and wouldn't rev over 2000 RPM. Today the car is hard to start and won't go much past 1500 RPM. It feels like its starving for fuel. We had the fuel pump replaced in January (low pressure/stuttering) and it went ok. Still stuttered occasionally however. Anyone had a similar problem? Whats the best way to test the pump or even the fuel?