when im crusing im my truck at about 1500-1700 rpm and i slightly increase my speed the truck seems to hickup and doesnt gain any speed or rpm. but ill let up off the gas and hit it again i have no issues. sorry if this is kinda vague. its one of those easier to show someone then tell them

 

More info needed , which engine , what mileage , what have tryed so far to fix the problem....

 

6.0L with about 140k, so far all I've done is check the fluid level. This coming pay check I am guna have it flushed

 

Thats a good starting point I also would have the transmission and engine codes read, It can throw a code without a check engine light. Just make sure that it is a code reader that can read the advanced ford codes most of the cheap scanners cant read them...

 

i finially got the transmission flushed, im not sure if that fixe the issues tho, still seems like around 50 mph and under 2000 rpm it still acts a lil slugish, makes me wonder is it possibly a fuel issue?

 

i bought the rev-x kit and that seemed todo the trick.

 

Awesome glad its fixed . but whats a rev-x-kit ??

 

its a oil and fuel additive.
http://revxoil.com/
Im thinking by how quickly it worked that my injectors were dirty/gummed up