94 chrysler LHS - rich fuel code?

Okay I got a code 52 with the igintion and looked in my book and its a rich fuel code. How do I fix this? If you can help I would really appreciate it. Thanks.:banghead:

Rich fuel usually means that there isn't enough air entering the combustion chamber. The opposite applies, "lean" is too much air (Bad gaskets). Check your Air filter, filter box, intake hose and plenum for any blockages.

Personal note; I found a mouse nest in my wife's filter box this Spring. Luckily, they didn't pass the filter.