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Ford gauges are always suspect. Never trust OEM gauges, especially older ones. It may be a bad ground somewhere along the line, or it may be an obstruction in the oil pickup tube. It could be a bad install, but probably not.

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โˆ™ 2004-12-16 10:29:10
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Q: Why would engine oil pressure suddenly drop completely while cruising or coasting a 1985 Ford 351w after changing sending unit gauge oil pump?
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