with just little info I would let a professional take a look at it.

 

I have a 2000 jxi and had the same problem, dcotter is right that distributor is most of the time the problem,Also check your distributor plug it gets bridle and cracks and may not let a correct connection,and if it is your Distributor get a Chrysler part the re-mans are junk you will have the same problem down the road and more time and $