I have a 2002 Freelander v6, intermittantly it will crank and not start, when this happens the check engine lite does not even do a bulb check, if you hook up a code reader it says nolink like the PCM is dead, wait a while and it starts no problem, when it starts you can check the PCM memory and it hasnt been erased all readiness monitors are still completed and a lean code p0171 and p0174 that it has had reoccuring are still present, any ideas.