The oil pressure sensor for a 1987 F150 could be bad. If the
sensor is good and the pressure has actually dropped then the oil
pump may be bad again.
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∙ 9y ago
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Q: What if your oil pressure gauge on your 1987 F150 has gradually dropped to zero pressure over a one month period and stays there The check engine light comes on now Oil level good 65k miPump bad?