hey i just picked up my new miata 2 weeks ago and its been leaking oil and oil pressure gauge isnt working, so far its leaked a little over a quart. i believe its the oil pan gasket or the the o ring ,but not sure. im just wondering if a leak would lead to the Oil Pressure gauge not working or if thats a separate problem. and if so how could i fix.
Don't rule out the rear main seal! The oil pressure sender could need replacing, but don't quote me on that. You could try cleaning the plug to the sender, as it gets dirty and doesn't work properly. I have the same problem, but my leak is slower than yours. Replace the CAS o-ring first.
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