My saxo sounds like a blender

Very good, I have a Sage 1.5 diesel and it makes me a very strong noise as if I had a fan beaten a sheet inside the engine ..... Also that when you step on the aclerior does not make na, it does not accelerate, but only sometimes .... I open the hood and shot of the accelerator cable and neither do it accelerates ... it has intriguing ... please someone can help me .... Thank you very much ...