From what I gather it doesn't turnover at all, then while working the ignition key it starts turning over at a normal/fast speed. If this is the case I would says it's electrical. Maybe the Neutral safety switch (won't let starter power unless it's in Park or Neutral). I would check the connections there and even the ignition switch/wiring.. You might even try to engage the key to start, and if doesn't do anything (with your foot on the brake) move the shifter in/out of park and try it in neutral also...Good Luck