See Figures 1 through 26
Following are vacuum diagrams for most of the engine and emissions package combinations covered by this information. Because vacuum circuits will vary based on various engine and vehicle options, always refer first to the vehicle emission control information label, if present. Should the label be missing, or should vehicle be equipped with a different engine from the vehicle's original equipment, refer to the diagrams below for the same or similar configuration.
If you wish to obtain a replacement emissions label, most manufacturers make the labels available for purchase. The labels can usually be ordered from a local dealer.
Fig. Fig. 1: Example of a typical engine vacuum diagram found on the inner engine hood panel
Fig. Fig. 2: Engine Vacuum Schematic-1982 E15 engine with Federal emissions package
Fig. Fig. 3: Engine Vacuum Schematic - 1982 E15 with California emissions package
Fig. Fig. 4: Engine Vacuum Schematic-1982-83 E15 and E16 engines with Canada emissions package
Fig. Fig. 5: Engine Vacuum Schematic-1983 E15 and E16 engines with Federal emissions package
Fig. Fig. 6: Engine Vacuum Schematic-1983 E16 engine with High altitude emissions package
Fig. Fig. 7: Engine Vacuum Schematic-1983-85 E16 engine with California emissions package
Fig. Fig. 8: Emissions Control System Schematic-1984 E15ET engine
Fig. Fig. 9: Engine Vacuum Schematic-1984 E16 engine with Federal emissions package
Fig. Fig. 10: Engine Vacuum Schematic-1985-86 E16 and E16S engines with Federal emissions package
Fig. Fig. 11: Engine Vacuum Schematic-1985-86 E16 and E16S engines with Canada emissions package
Fig. Fig. 12: Engine Vacuum Schematic-1986 E16 and E16S engines with California emissions package
Fig. Fig. 13: Engine Vacuum Schematic-1987 E16S engine with Federal emissions package
Fig. Fig. 14: Engine Vacuum Schematic-1987 E16S engine with California and Canada emissions packages
Fig. Fig. 15: Engine Vacuum Schematic-E16i engine
Fig. Fig. 16: Engine Vacuum Schematic-CA16DE and CA18DE engines
Fig. Fig. 17: Engine Vacuum Schematic-GA16i engine
Fig. Fig. 18: Emissions Control System Schematic-1991-92 GA16DE engine
Fig. Fig. 19: Emissions Control System Schematic-1991-92 SR20DE engine
Fig. Fig. 20: Emissions Control System Schematic-1993-94 GA16DE engine
Fig. Fig. 21: Emissions Control System Schematic-1993 SR20DE engine
Fig. Fig. 22: Emissions Control System Schematic-1994 SR20DE engine
Fig. Fig. 23: Emissions Control System Schematic-1995 GA16DE engine
Fig. Fig. 24: Emissions Control System Schematic-1995 SR20DE engine
Fig. Fig. 25: Emissions Control System Schematic-1996 GA16DE engine
Fig. Fig. 26: Emissions Control System Schematic-1996 SR20DE engine
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