This may be a taboo subject but will my van run normal without a catalytic converter? I can live with a warning light if that is the only issue it creates. Of course I would never run my vehicle without a cat, just curious.
I expect cat theft to get even worse as the price of palladium has already increased over 80% since December, (up to $2700/oz) and it’s an essential metal used in the manufacture of converters. Russia and Ukraine are the leading producers of it and supply chains are already disrupted.
I can't speak to diesel, but my 5.4 gasser ran fine when I was in between cats (after a mid-trip failure) a couple of years ago...not even a check engine light. But it was loud and very smelly at idle...and had notably more oomph...