Rebuilt Motor
After running rebuild engine over 900 miles I am having carbon buildup on no. 1 cylinder, the other 3 look normal. A compression check showed cylinder 1 was at 60, 2 at 70, 3 at 85 and 4 at 90. What would be normal reading, engine has a vibration and I'm wondering if the difference in compression could be the problem. Ideas?
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