Have a 96 jeep xj it sputter and misfires in neutral and park but when I put it in drive or reverse it seems to stop it only sputtered once before in drive but that's it went through a big mud hole on Sunday but it's just getting worse I have no idea what it is please help

 

MIL on?
If yes, what codes?

 

O2 sensor codes

 

So replace your o2 sensors...

 

Start with the upstream o2 and see how that does. About $40 on rockauto.com for the good NTK brand

 

Just for a reference I bought the Denso brand from Rockauto and had no problems.

 

What is the o2 sensor code?
There are like 10 different o2 sensor codes and they all mean something
A lean upstream sensor doesn't mean it's bad.

 

How about start with what the code says instead of throwing money at it?