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PCV Valve
New member here and this may seem like a dumb question but, I recently bought a 99 expedition (eddie bauer) and had a check engine light on. popped the hood and i noticed a hissing. Figured, easy, vacuum leak. so before starting the search i degreased the engine with some detergent and...- XSnowkiller
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- Forum: 1st Gen Ford Expedition Engine & Performance
