need some cheap advise, here is the problem: i have an 82 automatic delorean that normally runs fine. lately after a small drive i turn if off and it will not restart for about five minutes. it turns over fine but just turns and turns and then about five minutes later i come back and it starts fine. also when it idles the engine noise goes up and down for about three minutes then maintaines a happy medium. any suggestions.... mike leising sugarland, tx vin 11288