I have a 2005 F150 with the 5.4. A few weeks ago, I got a P0302 code. Went away and then came back. I have changed the plug, the coil pack and the injector for cylinder 2.

It's still doing it. Seems to be intermittent.

Any ideas??

 

You sure you changed the right plug? #2 is the 2nd one back from the front on the PASSENGER side.

You should have changed all 8 plugs if they have more than 60k on them.

 

Yup. Have the right one.

 

Check the compression.

 

Figured it out. Bad follower and possibly cam.

Now I have to find a cam.