hello fellow F150'ers

A friend of mine is looking to purchase an 04-08 f150 with the 5.4L and 4x4 is there any common issues with these trucks? Anything to look for when buying the truck?

 

Well, honestly, late 06-08 seems to be the better choice.
Less issues with cam phasers, solenoids, etc related to cam timing.

The plug issue (2 peice plug splits upon removal) was cured in really late 07 with a new head design.

The LS in the rear diff can chatter, regardless of year, depending on maintenance and use.

The cam phasers and plugs are the two biggies though. They come up most often, as compared to other issues. Both are repairable, albeit with some cost, but isn't that the case with everything?

EDIT: Forgot that you said 4x4. The IWEs and the 4wd solenoid on the firewall can cause some issues. System works on maintaining vacuum pressure, so any drop or loss makes the system want to engage. Sometimes it's partial, and you can here the pawls on the hubs grinding.

 

Check your fuel pump driver module housing for corrosion, a common issue, it is aluminum box mounted on the frame above the spare tire, while your there also check the spare tire lock cylinder for corrosion, they tend to bind and you can't unlock it with the key.

 

Great! Thanks guys for all your help!!!!!