My 95 Aurora just started running rough, particularly at Idle.
I noticed the rough running so I was checking it out in the garage.
All of a sudden smoke started pouring out the engine compartment.
I determined the smoke was coming from the CAT, ie it is plugged.
I changed the CAT and it still runs rough.
Anybody got Ideas of what to look for.
I am going to go over it this week as I have some time off.
I would appreciate any and all advice.
Thanks
Mark