I was driving down the freeway last night and my bone stock (engine) 2007 3500 5.9L started smoking. Any ideas?

Here's the video I took of it:

 

likely injector(s) failed. How miles on your rig?

 

A bit less than 200k miles on it.

So, any idea on how to test injectors to find the bad egg(s)?

Thank you!

 

With that many miles on original injectors (assuming theyre originals) youre better off just replacing them all. It'll be a bigger headache to replace one, then another, and another etc...as each fails.

I have just over 204,000K miles on my original injectors with no issues...…...yet.