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

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.

by in Sunland, CA on September 03, 2013
1 answer
ANSWER by on September 03, 2013
have map sensor tested and check for vacuum leaks..