Ok so I think I'm having a fueling problem somewhere on my truck. It's a 99.5 f250 the truck has a shaking/vibrate goin on at idle but when I hit 1500 rpm it's back to bein smooth as glass. Where should I start lookin at? It did this once before when the cps was bad but I just changed it not to long ago and it doesn't have all the same symptoms as before.
Need help plz its driving me nuts!!

 

Could you describe what it's doing better? Is it choking out like it's not getting enough fuel/compression, or is it missing?

Sounds like a UVCH to me.

 

Sounds like a miss maybe an injector is out or something. It's has 554,000 on same set of injectors.

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It still has great power and doesn't smoke any just shakes real bad like something in there might be loose or not firing right

 

Sounds like you need to find a good diagnostic scanner and run a couple tests, like injector buzz test and CCT. With that many miles.....might be time for new injectors,

 

That's what I'm afraid of it's new injector time