When you replaced the hoses did you check the plastic one that goes from the
PCV to the EVAP emissions valve on the firewall.
This can develop small pin sized holes in it and be hard to detect.
Happend to me and lots of others.
1996 2.5LT V6 Contour ATX
My Tour+help/info pics
E0 rims, Gutted Pre-Cats,CTA Custom Exhaust & Intake, Diablo Chip.