2000 Excursion 7.3 problem

[Mrgrank]

I just joined the site with the hope to try and figure out a possible problem before taking to Ford dealer for help. My 2000 Excursion with 7.3 has been very reliable and not given much of any problems. Engine has 160K miles. About a week ago, I was getting on the interstate and the vehicle began vibrating as I pushed the accelerator and acted as if the emergency brake was on. I pulled off the road and tried to look at and did not notice any visual problems and after 5 minutes looking, got back in the truck and it drove without any more incident. A day later the problem came back and now I have the vibration back and happens when I push the accelerator. Also, upon starting it up, it has some more white smoke than normal and the odor and much worse/stronger than ever before. I have tried to read posts and see potential issues, but wanted to throw out my situation and get any help. I appreciate any thoughts before I have to take to Ford dealer for diagnostic testing. If any has any good mechanics for powerstroke near Clarksville TN (45 minutes north of Nashville), let me know.
Thanks for your help.

[BIG JOE]

Check your private messages....

[NoRalPh]

Lemme Guess.... Joe's gonna tell you it's the batteries

[BIG JOE]

Nope. Actually wound up being his fuel pump was bad. Caused by bad connections on the batteries.

[NoRalPh]

Good thing his piston rings didn't weld then too - huh?

[BIG JOE]

I know. I was kinda worried about that too, but it actually ran like a champ by the time the new pump was installed.