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Just got a 2009 mini with n12 r55. For 500$ car is in really good shape. The guy that had it should not even be working on a toy car. He said the timing chain broke .it did not. He had the valve cover off an the exhaust cam walked back a little an was rubbing the brake pump it was broke on the inside I replaced it the cam went back in the right location put all back together turns over fine but doesn't try to crank it's got fuel an spark new to the little cars always been a v8 chev guy. The reduced power popped up an has no codes. Any help on where to start. Thanks