i have a 07 f-150 5.4 it has a slight shake while idling really its just running ruf at idle i brought it to the dealer and they put a cam phazer in but still does the same thing dealer ship says they don't know whats rong with it . what should i do its still under warranty shouldn't then have to give me something or fix it i don't know please help. thanks

 

Good luck, my 05 5.4L has the same problem. From what I've been reading here, this is a fairly common issue with the 5.4's that has alot of "possible fixes" but nothing seems to help permnantly. A few guys are swearing by remapping the ECU with engine programmers, but that is a little extreme to me.

Use the search function and just start cruising the dozens of posts.

Cheers
Lenn