Car was dead one day, After leaving the lights on, Went and got some jumper cables and the car crunk up fine, Went to take them cables off and the Positive cable on the battery was loose and it disconnected, Then the car cut off, So i reconnected it made sure they was tighteded down, Went to start it and nothing. All it will do is turn over. Any ideas on this? I have had the battery, Alternator, Starter. And distributor tested. As well as the timing to make sure it didnt jump time. Any ideas what the problem could be ?? Thanks