I have a 2001 Ranger 114k miles doing the same thing with the oil pump i changed the oil dark but not clumpy mine doesnt idle any diffrent and the power is still there but it shows no oil pressure when i first start it and knock alittle once it warms up i show oil pressure and the knocking goes away im looking into changing my oil pump but wondering if it could just be a blockage that shifts around in the block any ideas to save me 202 bucks on an oil pump?
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