No disrespect. there are two little filters on the the sending unit pic-up tube in the fuel tank. Best way to test is to hook a fuel gauge in the fuel bowl and see if your loosing pressure in Certain rpms. If you get the pressure but it drops and the truck stutters I would check in the tank. Its cheaper to eliminate that problem. If it the pressures are fine, then your good from the tank to engine. Your next test is possibly the injectors.
I still think you might want to look into the Cam position sensor. I had the same intermittent stuttering.
good luck.

 

hey thanks for the info, thats the good thing about talking to diff people at once. everyone knows something that most dont. but when your was doing this? see i live in the ozarks and this means not a straight stretch in the county so u do a lot of toping the ridges so your not in it but not quit out of it either. and is seem when i go to let off the acc as im topping it acts like its just not getting the fuel it needs.

 

This happened in the cascade region last year going Lassen park. We have some mountains. At first I thought it was the fuel pump? It tested fine. It took dropping the tank to figure out the issue. I am not saying this could be your problem. Every truck does something different. All we can do is send you on the right direction to get you to diagnose the problem. None of us can really effectively diagnose a truck unseen. But don't quit asking questions! We can still give you ideas on where to look next. And we like to read how people are able to fix their truck problems.

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Just to let you know 24mpg highway can be obtained. I am getting 16.5 mpg city as we speak. I don't know what I am getting on the highway yet, and might not be able to find out!