i have a 2.3l ranger. during the last 2 fill ups. the first when i topped it off the fuel gauge said that i only got 3/4 of a tank. then the next fill up it went all the way to full .i no that i can go about 2 weeks and 2 day on a tank of fuel. so it was about 2 weeks and 3 days and the gas gauge was still reading above 1/4 a tank and did not move . i am thinking it is the sending unit . have checked all the fuses and they are ok i dont think it is the pump beacuse the truck runs great no problems but this.any help would be greatfull. thank you in advance.