a fuel pump module with an inlet fuel filter has a vapor inlet in communication with the interior of the filter and constructed to reduce the size of larger vapor bubbles trapped within the filter before they are ingested by the fuel pump downstream of the filter to limit the amount of fuel vapor ingested by the fuel pump at one time . preferably , a tubular inlet sleeve is integrally connected with the fuel filter and press fit onto the inlet of the fuel pump as a subassembly with the vapor inlet passage formed in the inlet sleeve . the vapor inlet passage may be a slot formed in the inlet sleeve providing a reduced area flow path through which vapor in the interior of the filter may pass before entering the fuel pump .