Front wheels not engaging/ no 4-wheel drive.Hiss indicates a vacuum leak.
What is your question?
Might a vacuum leak be the cause ? Looking for ideas / possible things to look for. Any ideas ? Of course it's winter. Thanks' to all who reply ! Happy 2015 !
RepairPal Certified shops can diagnose and repair your 2000 Jeep Cherokee. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.