k, reasently my car had it's motor swapped, and the motor that went in had a bad cam sensor. but for sum reason the mechanic thought it was the wire going to it. so he cut the wire and put his own in there. then after, we replaced the sensor with the one off the old engine, which i knew was fine since i never had a problem with it. but now, the motor wont start most of the time. sumtimes it starts fine, but other times it just keep crankin and it sounds like its backfirerin a little. so basically the motor cant find the timing to start. but wayt could it be? the sensor was replaced, and i made sure that the wire is tightly connected. if neone can help it would be appreciated as i'm am really loosing pacience with this car