What is the best and least expensive way to check and maybe cleanout the catalytic converter(and pre cats) on my 380? I have been told that these could be the reasons for the slugishness and rough idle.
Is this something I could do myself?
I have a good friend that owns an independent muffler shop. Will he know what to do? What is required to check these items. Maybe someone has had the same problem. Thanks for your help.