so I pick up this cirrus drove fine first day . Next day in the morning I turned it on . About a minute went by and it shut it self off . Thought maybe it sat awhile before I bought it . So drove it to work and with in 25 minutes came to a light and it shut off at the light .started right up . Still doing the same thing . Replaced the alternator because it failed voltage regulator. Swapped the auto shut off relay . Cleaned the throttle body and cleaned the iac . No change . No codes no lights on dash . Any ideas ?