Its issue with fuel filter.Have you also replaced the fuel filter too.If its blocked then it can also cause this problem.Also in some cases its seen that new fuel pump comes out faulty.Was it original fuel pump or aftermarket fuel pump.Get the fuel pressure checked.If the pressure is low,then it can be issue with the new fuel pump.------------For more help Click the link below:-----
http://repairhelpcenter.blogspot.in/2012/05/jaguar-fuel-pump-problems.html -------------This will help.Thanks.
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