Thank you for allowing me to assist you, my name is ***** ***** I will be happy to assist you with your concern today.
I would start by emptying the fuel filters into a glass jar and letting it rest to see if there is any water or debris in the fuel, also check fuel pressure, since the problem is with both engines I would start by checking fuel, since you ran the tanks dry it is a good chance there was junk in the bottom of the tanks that is now stuck in the system.
I am just seeing if you still need assistance with this problem? The reason I ask is because I see that your question has not been answered sooner and I wanted to make sure if you still needed help.
In some cases a question may sit due to several different reasons. My objective that I wish is to make sure that if you still need help that I can at the very least reach out to you and attempt to help you.
At this time please feel free when you are ready to reply back to me and ask to continue working with me, another expert or if you no longer need help please just let me know exactly what you wish to do.
If you need any further assistance you can reply back at any time for my help.
I'd be happy to answer any other questions you have even if not related.