Combine started stuttering the other day until the air intake gets over 66 degrees, then ran fine the rest of the day. Did the same thing yesterday morning, until the afternoon I shut engine off, then It wouldn't start. Computer says camshaft and crankshaft sensors are out of alignment. The motor would start as long as I had one of the two sensors unplugged, it made no difference which one was unplugged. Once it was running, plug sensor back in and had no errors. But it still stuttered until air intake got warmed up. Also when it stutters it fits as much white smoke out the stack as it can.