So I officially picked up my 2000 f150 offroad package yesterday. It has a block heater, interior core heater, trailer brake light hook up, and an auto start. Here's the problem, the person I bought it from(also military) said he would shut it off and come back out and it wouldn't start. 15-30 min. Later it kicked right up. Said it had only happened a handful of times. When I picked it up and drove it to wells Fargo to cash the loan it didn't start 30 mins later started, same thing when I went to get it inspected. But it hasn't done it at all today(knock on wood). Anybody know what this might be?