Is it better to do a root canal before a crown?

Hi,I recently had a temporary crown placed on my upper right molar (tooth #3). The tooth had a very large filling prior to the temporary crown and I would feel a jolt or electric feeling whenever I ate something hard. I got 3 opinions from 3 dentists, they all said their may be a fracture and since the filling was so big a crown would fix it. Their opinions all lined up. Its been 4 weeks since my temporary crown has been put on. On week 3 I went to get the permanent one placed but I told them that I still feel a small jolt feeling lasting like 1 second when i eat hard foods on that tooth. They examined the tooth and said the bite was high and they adjusted it and told me to wait another week. After the adjustment which was 6 days ago, I still notice the jolt is still kinda there. When I bite down on the inner cusp thats where I feel the sensation. The sensation is only felt on the inner cusp of the tooth nowhere else. Also, If I press my finger or push my finger up against the tooth I can feel the jolt.  Its not painful really just annoying. The sensation comes on for 1 second then disappears as I continue to chew. Questions:1. Do you think putting on the permanent crown wont solve this and Ill need a root canal? I doubt theres a nerve issue, the xrays showed the nerve looked fine and my symptom is so minor and small. What do you think? 2.Can i just do the permanent crown now and see if that solves the problem or is it better to do a root canal before a crown?