Truck bogging at 30-40mph

Try some fuel injector cleaner? Chevron techron. Black bottle. Auto zone and Advanced Auto parts have BOGO sales frequently in Mass.

Good shtuff

 

@Larzzzz I'll try that tonight

 

Sometimes water gets in the connections and causes problems that's why I asked (happened recently to a friend). You're going to have to narrow down your problem or take it to a shop.

Since it only bogs at 30-40 if you keep the truck in 2nd or 3rd gear at 30-40 it still bogs?
When you're 1/4, 1/2, and, full throttle it still bogs at 30-40?
In neutral/park it doesn't bog at all through the rpm range?
Once you get past where it bogs at 30-40mph does it take off?