2004 Volkswagen Jetta Wagon

STARTING AT AROUND 130,000 MILES, WHEN GAS TANK IS AT A QUARTER OR SLIGHTLY LESS, THE CAR LOOSES POWER AND ACTS AS IF IT IS NOT GETTING FUEL TO THE ENGINE. WHEN THIS HAPPENS WHILE DRIVING DOWN A HIGHWAY AT TYPICAL HIGHWAY SPEEDS, POWER IS LOST FOR 10-15 SECONDS, RPM DROPS TO AROUND 2000 OR LESS (WHILE IN "DRIVE"). THEN ALL OF A SUDDEN, THE ENGINE JERKS TO LIFE, AND I CAN DRIVE THE CAR NORMALLY, UP UNTIL I HAVE TO REFILL THE TANK. THE STALLING DOESN'T REPEAT ITSELF UNTIL THE NEXT QUARTER TANK. WHEN THE QUARTER OF A TANK ISSUE HAPPENS IN THE CITY AT SLOWER SPEEDS, THE CAR DIES, DASHBOARD ENGINE LIGHTS COME ON, AND I HAVE TO PULL OVER, AND CRANK THE STARTER 3 OR 4 TIMES, AND EVENTUALLY, IT STARTS BACK UP AGAIN WITH NORMAL DRIVING RESUMED. ONE TIME I WAS DRIVING UP A HILL, LOST POWER, AND HAD TO PULL OVER QUICK. WHEN THE QUARTER OF A TANK ISSUE HAPPENS WHILE PARKED, ENGINE AT AN IDLE, THE CAR DIES, AND I HAVE TO CRANK THE STARTER A FEW TIMES TO RESTART THE CAR. THIS PROBLEM ONLY HAPPENS ONCE PER TANK CYCLE, ONLY AT THE (APPROXIMATE) QUARTER OF A TANK POSITION, AND DOESN'T HAPPEN BETWEEN THE FULL TO 1/4, OR THE 1/4 TO EMPTY PHASE. I KNOW I AM NOT OUT OF GAS, AS I'M FILLING UP THE TANK TO NORMAL LEVELS. THE FUEL PUMP HAS BEEN REPLACED TWICE, AND THE FUEL FILTER ONCE. MY MECHANIC CHARGED $80 TO DIAGNOSE THE CAR, ONLY TO FIND A CODE ABOUT A SPARK PLUG THAT MISFIRED - WHICH OF COURSE WILL HAPPEN DURING FUEL STARVATION. SPART PLUGS REPLACED, BUT THE PROBLEM HAPPEND AGAIN. I'VE CALLED 3 OR 4 VW REPAIR SHOPS, AND NOBODY HAS A CLUE HOW TO FIX THIS, ESPECIALLY WHEN I BRING UP THE QUARTER OF A TANK ISSUE. THE ONLY WAY TO PREVENT THIS FROM HAPPENING IS TO FILL UP BEFORE HITTING 1/4 TANK. IRRITATING !!!! ISSUE GOING FOR ABOUT A YEAR NOW.