2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/229090A model universe is proposed in the framework of 5-dimensional noncompact Kaluza-Klein cosmology which is not Ricci flat. The 4D part as the Robertson-Walker metric is coupled to conventional perfect fluid, and its extra-dimensional part is coupled to a dark pressure through a scalar field. It is shown that neither early inflation nor current acceleration of the 4D universe would happen if the non-vacuum states of the scalar field would contribute to 4D cosmology.13 pages, major revision, published online in GRGGeneral Relativity and Quantum Cosmologytext