you need to find your decal on the underside of hood or on the shield above the radiator cooling fan.
1997 PCED OBDII-A
SECTION 1A: Description and Operation
Vehicle Emission Control Information
Each vehicle has a decal (Figures 1 and 2) containing emission control information that applies specifically to the vehicle and engine. The specifications on the decal are critical to servicing emissions systems.
Figure 1: Typical Vehicle Emission Control Information Decal for 49 States Vehicles
Figure 2: Typical Vehicle Emission Control Information Decal for California Vehicles
Figure 3: Typical Vehicle Emission Control Information Decal for Canadian Vehicles.
In addition to the tune-up specifications and procedures, the emission decal shows a color-coded (shown in black and white) schematic of the engine vacuum system. The color coding on the schematic represents the actual color coding on the vacuum hoses. However, there will be instances when a hose color does not match the color on the decal.
Typical location of the decal will be on the underside of the hood or the radiator support sight shield.