1996 camry. Vac hose from plum to map sensor causing rpm to go up 1500 pr more

What is your question?

replaced head gasket on car and redoning vac hose, have it completed, yet the vac hose from plum and along the back to map sensor is causing rpm to increase by 1500 or more yet when its off runs at approx 1000 rpm. tried another map sensor same thing, Any help how to fix

What makes this problem better or worse?

not such what makes it worse as do not run it with it om RPM HIGH ISSUE

How long has your 1996 Toyota Camry had this problem?

just started after head gasket replacement