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.Google+
Car Problem Reports
Jaguar XJ6 Water May Accumulate in the Fuel Filler Neck Cavity Due to a Blocked Drain
Jaguar XJ6 Problem
Visitor, 1995 Jaguar XJ6
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?