Help Please
 

ok i have an 87 nonturbo. i havent driven it for over a week. today i went to go get cigs for my dad and when i was gettin home the engine noise changed. It turned to a poppin sound. the car is hard to start now. take a little while and when u do start it, it does the poppin thing. Is it a lose air hose or did i blow the SOB. Someone please Help!!!!