1996 Honda Civic Q&A

1996 Honda Civic Question: Why is there Rattling noise from engine going up hill on my stick shift 96civic

Why is there Rattling noise from engine when going up hill on my stick shift 96civic? And also why when I turn on the a AC the rpm's drop to the point that the car wants to turn off? Please help. -
Answer 1
have map sensor tested and check for vacuum leaks.. -