Today i was driving and the truck shook for a second didnt really think nothing of it. Well tonight i was leaving a stop light and the truck started shaking but this time it did not stop. When i give it gas the truck shakes but when i coast no shaking welll i got home and lifted the hood. It makes a sucking noise and ideas dont think its spark plugs or it would do it all the time

 

vacuum leak or pcv valve maybe. just guessing. But I bet its a vacuum leak. Check all of your vacuum lines. No CEL lights?

 

nope

 

x2 - sounds like a vacuum leak to me - go over all the lines carefully - sometimes it helps to have a buddy lightly rev the engine to make the sucking noise louder while you search

 

That's the trick.

 

problem solved had original spark plugs , 2 coil packs were bad, 6 boots and springs were bad and the 2 lines that come of the egr to the head were shot runs great thanks for the quick replys guys

 

Hey glad u got it figured out, all that will do it.