What do I do when my vehicle accerleates and dies?

What do you mean accelerant and dies?

Would you know what to look for , if I said to check for vacuum leaks? Otherwise , the tester would hook up to the 'DLC' connector under the drivers side dash , maybe under a cover. ALL OBDII are standard connectors. Maybe check owners manual for better description of location. Has the 'Check Engine' light been on , prior to this incident?