2013 Nissan Maxima

I PURCHASED THE VEHICLE IN 2017 WITH 39997 MILES ON IT. WHEN I TOOK IT TO THE GAS STATION THE PUMP SHUT OFF EVERY 6 CENTS. THE PLACE I PURCHASED THE VEHICLE AT WOULDN'T DO ANYTHING BECAUSE THE CAR WAS SOLD "AS IS' AND A WEEK HAD PASSED. I DIDN'T TAKE THE CAR IN FOR REPAIRS BECAUSE I DIDN'T HAVE THE MONEY . I REFINANCED THE VEHICLE IN 2018. SHORTLY AFTER THAT I RECEIVED I LETTER IN THE MAIL FROM NISSAN OF A WARRANTY POLICY ENHANCEMENT WHICH WAS FOR COMPLETE EVAP TUBE BLOCKAGE. READING FURTHER THE LETTER DESCRIBED EXACTLY WHAT MY CAR WAS DOING. SO I TAKE THE CAR TO PISCHKE MOTORS NISSAN FOR REPAIRS. THE CAR HAD 69978 MILES ON IT AT THAT TIME. THEY TOLD ME THAT IT HAD TO BE A COMPLETE EVAP TUBE BLOCKAGE TO BE COVERED BY THE WARRANTY. I WAS THINKING THAT THATS WHAT IT HAD TO BE BECAUSE THAT IS EXACTLY WHAT MY CAR WAS DONG. WELL THE TECH GUY STATES THAT HE CAN GET SMOKE TO RUN THROUGH THE EVAP SYSTEM, VENT VALVE WORKING, FOUND AIR TO PASS THROUGH THE FUEL FILTER AND BYPASS LINE AND HE STATES THAT ITS ACTING LIKE THE FUEL TANK IS HAVING AN INTERNAL OBSTRUCTION. I HAD TO PAY $116.05 FOR THE DIAGNOSTICS AND THEY TRIED TO SELL ME A NEW GAS TANK FOR $ 1200.00. NISSAN SENT ME THE LETTER BECAUSE THEY KNEW THE VEHICLES HAD ISSUES. WHY SHOULDN'T THEY HAVE TO COVER A PARTIAL BLOCKAGE? I'M VERY UPSET THAT I HAD TO PAY OUT MONEY AND NOTHING WAS FIXED. SEEMED LIKE A SCAM TO ME.