My ford transit loses power then dies what could it be please help?

Hope there's some one who can help me I have 2004 ford transit 2.4 350/t135 and it's starving its self of fuel plus cuts out over 3 thousand revs there's no fuel going to the fuel filter iv tried replacing the housing iv changed the injectors cleaned the tank out and still it keeps dying please help got no more money to throw at it