2001 Ford Focus Recently Purchased Mk1 1 4lx Which Running Rich There Maf Sensor

i have recently purchased a mk1 1.4lx focus which is running rich there is no maf sensor on the vehicle and no visible wiring showing there ever was also i cannot see any map sensor around under or near the inlet manifold or behind the altinater the Haynes manual i have says it should have a maf sensor but it does not look like it has been removed as there is no loom for it or wires that have been cut if i purchase a maf sensor and wire it up as the Haynes manual says or will this cause problems thanks ipb