Q: what would cause the oil pressure to drop very low when the engine idles running on 1997 Ford F-150

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its has around 40lbs at idle 2 or 3 lbs the engine has 125000 mile on it very will takin care of
(2) Answers
(5) Comments
More info. on truck 97 F-150 aint enough! 5 engine possibilities, oil sae, what brand of filter. Is this a new problem?
Are you checking it with an actual test gauge?
remove the sending unit and installed a manual gauge sound like I can hear a knock like main bearings?