3406E Smoke at idle

The 3406E in my W900 has started smoking at idle. There’s a light gray haze when not under load, and a pretty healthy cloud when it starts after sitting awhile that definitely smells like diesel. Happens all the time whether warm or cold. I assume it’s an injector, but want opinions. Need it to get through next week before I can work on it.

 

Thanks for the replies. The only time it smokes is while it’s idling under 1000 rpm. Warm or cold it puffs the same. No smoke at all while driving, and no loss of power. That picture is after running all day. The lights on the fuel station awning emphasize the smoke a bit. Curious how urgently they need to be replaced. I’d like to get a couple more weeks out of it anyway before spending a ton of money replacing all six injectors. I know of a roll off container truck at a place I used to work that has had a Cat with a leaking injector going on 7 years now.