well pretty much ever since i got my cav lss,its had a wierd on/off issue were when cold it will stall out on me put the clutch in as i stop at lights,signs etc..it doesnt happen some days,others its annoying..so question is what would cause that?..my buddy thinks it might be a clogged cat but i think he just wants to bust the cat out to make my exhaust louder..so ideas plz