DEAR SIR.......WHAT DID IT END UP BEING? I AM ABOUT TO CHANGE MY LIFT PUMP CUZ OF THEEXACT SAME ISSUE. DRIVES BEAUTIFUL UNTIL A HILL COMES UP WHILE LOADED... THEN ENGINE LILGHT LOW FUEL RAIL PRESSURE IS ONLY CODE. SAME SITUATION. NEW FILTER NEXT IS PUMP.... WHAT WAS YOUR END RESULT PLWEASE!!! JUIST LOOKING TO SAVE SOME STEPS HERE IF IM NOT ONTEH RIGHT DIRECTIOPN