yesterday a friend say to me it could be thay the fuel pump may be was not fitted correctly.
Today i reinstalled it and the sound is gone! when i replace the fuel pump motor the first time i have to bend a little the casing in order to take out the old one. now i repair that and all is OK.

thanks.

98 contour SVT 02 Seat Toledo Trubo 07 BMW 335i turbo. on order.