Lift pump failure is very very very common on the 03-04.5 Common Rails even under stock fuel. Mine gave up the ghost after 125k. Great call going with the fass! I love my FASS HPFP!:thumbsupmy truck has 50000 miles on it and the lift pump went out this weekend! i put a fass lift pump today! just wondering if my smarty caused this or if this is normal?