so here's my problem my 2003 monte carlo ss pace car will start like a champ the first time dead cold. but after i get anywhere be it 30 miles or 5 if i turn the car off for more then 3 minutes its a really rough start which usually ends in the enging dying. the engine can usually dies within 2 minutes after the second start. this just started happening 1 day ago. i kinda think someone put something in my gas tank. because this is so sudden and it started in a wal mart parking lot. my dad is handicapped but i had to run back to my car to grab my cell phone since i had forgotten it i think someone saw just me going to it so any ideas anyone im scared its only going to get worse and not start at all.