Contrary to what has been said in the other answer, this is a common fault with these cars.
As to fitting, I'd buy a Haynes manual for your car.
t, June 2008
that makes no sense.the pump cannot decide how much fuel is in the tank.it must have dislodged the fuel pick up.that is what u need to attend to.clearly the pump appears fine.check for removable plates in vehicle body that might give acces to tank.under rear seat/carpet.if so gain acces to tank and remove pump.probably find pick up pipe /pre filter has droped off.