1990 chevy lumina 3.1 liter

How do you change coil packs on a 1991 lumina? Is there somewhere i can find a diagrammed break down so i can see exactly how to remove the old one and put the new one in. Thanks. Dwana.

The fuel pressure regulator is located underneath the intake plenum. To change the coils the is a bolt at the top and bottom of each coil and 3 wiring connections on the control module that is behing the coils. There is a firing order on the body right above the radiator.