nzevo6.5

hey guys just wondering if anyone could give some advice, had my evo 6 for about 6 years and just recently its started randomly dying for no reason what so ever only details i have are the check engine light comes on when it cuts out the light does not stay on and the times it dies is completey random for instance it can run for a while without cutting out then all of a sudden it packs a ****ty and dies 4-5 times in a row i also noticed it usually sits at 14volts on the turbo timer and when it starts to **** itself the voltage drops to 11-12 also have just got a new battery and car was sittin for round 6 months prior to this happening any advice or help would be apreciated thnx