Water May Accumulate in the Fuel Filler Neck Cavity Due to a Blocked Drain on Jaguar XJ6

After the car has been washed or in the rain, the cavity around the fuel filler neck may be filled with water due to a blocked drain. The water and debris can then enter the gas tank when the gas cap is removed for refueling. It is recommended to clear the cavity of any water or debris before removing the fuel cap.

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Average mileage: 113,993 (75,000–152,986)
5 model years affected: 1990, 1991, 1992, 1994, more1995
6 people reported this problem
3 people shared problem details
The solution is to give the small holes in the top of the rubber drain stopper a shot or two of compressed air. I used canned air purchased from an electronics store...and voila, the collected water drained out immediately. Using low-pressure compressed air is the solution recommended in the Jaguar XJ6 service manual.
Due to recent biblical rain in California the fuel filler neck cavity has filled up with water due to blocked drain. I have tried running a wire coathanger through the drain hole to unblock it - but no success. Any ideas?
1990 Jaguar XJ675,000
Compressed air or long piece of sodder or similar thing, strong wire
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