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Is there a PCV valve on the 1994 jeep wrangler yj 4.0 liter?

No, the 1994 Jeep Wrangler YJ 4.0L engine does not have a traditional PCV valve in the same way many other engines do. Instead, it uses a PCV system with a grommet and hose routing that incorporates a crankcase breather as part of the system. There's no separate, replaceable valve like you'd find on other engines.