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I'm losing oil pressure on 5.9 cummins whenever I stop at a stop sign. The pressure will drop from above 40 down to 20-30. It just started doing this a few weeks ago before it never moved off of 40.?
Wiki User
∙ 9y ago
Check the oil filter for a clog. The oil pump screen could be clogged or the pump could be starting to fail.
Wiki User
∙ 9y ago
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