What is the firing order of a 1984 Plymouth Neon?
That information is unavailable until the 1995 Neon. I hope you didn't buy a 1984 Neon .
The most simple explaination is that there is no real difference. Plymouth was the original company that both Dodge and Chrysler grew out of offically in 2001. The 2001 Plymouth Neon was the last car the Plymouth produced so really there is not many differences at all between a 2001 Plymouth Neon and a 2002 Dodge Neon.