So I finally got my slow cranking starter problem fixed by putting on a new one. She cranked fast and hard! Got the lines bled and she fired right up! Throttle up and down just a little and all sounded perfect. Set her to slow idle to let it run awhile to warm up and after a minute or so, starts blowing smoke out vent tube from valve cover. Minute or so later she starts to bog down and konks out. Hit the key and she won?t even turn over...like it?s seized up again. Have no idea what might have happened, all new insides. Only thing I can think of is that the shop that ground the crank didn?t get it right and spun it spun a rod bearing...anything else might cause this?