I have a 2005 F150 5.4L V8 with 82,000 miles on it. When it is idle it has a ticking noise in the engine. It almost sounds like a deisel truck engine when it is idleing any ideas why?

 

if the ticking noise is noticeable at 750-1000 rpm, most likely you need a cam phaser (1 or 2)

 

i have the same problem it only does it when starting up and when the motor starts to warm up it stops I have the 4.6 2 valve tho

 

ys dont need a cam phaser.Our trucks are known to have this sound.Research some other threads,ask around at the shops and whatnot and the same anmswer will always come back that you dont need to replace them.Again its normal and always have been from 04-08's

 

Agree these trucks are noted for a ticking sound, according to my dealership it's the fuel injectors. but if your concerned bring it to someone to get her checked out.

 

To make you feel better, do a search on "ticking"; you will see many posts on this, and then you will know you're not alone.

As squirrelyyy mentioned, you can also take it to your nearest Ford dealership. A service advisor will let you know (for free) that this noise is acceptable, assuming it is what the others are describing to you (injectors, cam phase lifters).

Diagnosing a sound related fault on a forum like this is a crap shoot at best. I'd take it to the service department and have them advise me if it were my truck.