Jeep Wrangler/YJ 1987-1995 Repair Guide

VACUUM DIAGRAMS

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Following is a listing of vacuum diagrams for most of the engine and emissions package combinations covered by this guide. Because vacuum circuits will vary based on various engine and vehicle options, always refer first to the vehicle emission control information label.

Should the label be missing, or should the vehicle be equipped with a different engine from the original equipment, refer to these diagrams for the same or similar configuration.

Replacement emission information labels can often be ordered from a dealer.



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Fig. Fig. 1: Emission control vacuum schematic-1987-90 with 4.2L engine and automatic transmission



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Fig. Fig. 2: Emission control vacuum schematic-1987-90 with 4.2L engine and manual transmission



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Fig. Fig. 3: Emission control vacuum schematic-1991 with 2.5L engine



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Fig. Fig. 4: Emission control vacuum schematic-1991 with 4.0L engine



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Fig. Fig. 5: Emission control vacuum schematic-1992 with 2.5L engine



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Fig. Fig. 6: Emission control vacuum schematic-1992 with 4.0L engine



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Fig. Fig. 7: Emission control vacuum schematic-1993-95 with 2.5L engine



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Fig. Fig. 8: Emission control vacuum schematic-1993-95 with 4.0L engine

 
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