Gas fillup in my 89 260E

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Here's the problem - many times I go to a gas station, and the pump stops after only a gallon or two has gone into my tank.

The attendant (this is in NJ - there is NO self serve in this state) rings me up unless I sream out that it is far from full. Usually, it takes another 2 titmes before my tank is full.

My gas gauge is accurate. Is there something that needs repairing to make filling my tank less stressful?