I have a 07 F-150 FX4 with 5.4 triton. I have replaced plugs,coil packs,& injectors. When engine is at idle sometimes it starts to miss & sounds like the engine is coming apart I can give it gas and it smooths out.PLEASE HELP

 

Have you tried cleaning the MAF sensor?

 

not yet will check thanks

 

If you have a scan tool you7 can connect it and see if the MAF is sluggish.

 

Check your connections to your COP's and you still may have a bad plug...like mentioned above scan it for codes...

 

Does it miss when your driving it? Could be a bad wire going to 1 of your coils.

 

runs great when driving , just at idle sometimes,sounds like i have no oil pressure but thats fine . give it a little gas and it smooths out

 

I have an 07 FX4 and it seems to miss right around 45mph..went to the dealer today to get it checked out and they said they found nothing...sure enough as I am driving home, same problem again as I stated. Been doing this for sometime now...any other suggestions??

 

new timing gears,chains,cam phasers,plugs,coil packs,injecters still rattles at idle sometimes WTF

 

My 2006 with 83,000 miles started doing this miss a few weeks ago. It usually smooths out after warming up. Drives smooth just acts up at idle.