RepairPal Certified shops can diagnose and repair your 2002 Ford Taurus. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Possible vacuum leak(s) check the entire pcv system inclu. the pcv valve! Look all over/under the intake plenum for ANY rubber hose that has sucked together or are deformed in any way.
Thank you. :)