Car turns over fine but makes popping sounds while running. on 2001 Plymouth Neon

Recently car came to a sudden stop while driving around 25 miles per hour.Would not move engine still running.Turned engine off and tried to restart but would only make a popping sound.Found out water pump froze and damaged timeing belt though it didnt completely break it was missing a few teeth and had a slit in it.Replace belt and pump now car starts ok but pops while it is running.Why is that?

Asked by for the 2001 Plymouth Neon
1 answer
timing belt sounds like it off marks.