01 T & C Trouble Turning Over
 

I have an 01 T & C that is having trouble turning over. No ryhme or reason. It cranks just fine but won't quite turn over sometimes, usually every other day or so. Alternator went bad and was replaced 2 months ago. Got a new battery at that time also. One time it kicked the check engine light and I got the codes saying that the battery had been disconnected within the last 50 starts along with the codesfor the ignition coils A B and C. I cleaned the terminals really well, lubricated, and that seemed to help but now the problem is back. Any suggestions short of taking it to the local shop? Thanks in advance for your help!