2003 V6 mustang. Here is the back story, I bought it from a guy who was having PATS issues a month or so ago. He finally gave up and I bought it now here I am. It is not a pats issue because I sent the PCM to have it turned off in a tune. What happens is that it wont start but it is random. it started 10 times in a row last night and the would not start. It will probably start at some point today. when it wont start, you know its not going to because the fan comes on with the key. That means no communication from pcm right? As far as I can tell, I have the power to the pins at the pcm connector (55, 71,97). Also with the key on I checked a couple sensors and I have 5 volts. The guy that had the car had a new pcm installed so I don't think it is that. For some reason the pcm just decides not to power up at times. the cluster goes to dashes when this happens. WMBURNS or anyone else have any ideas on where I can start?