Hi guys , new to this site and truck , have a slight problem at idle with cylinder number 5 , it misfires only at idle , as soon as I get it to Rev at about 1000 rpm it runs smooth as silk , never hesitates under load , before I jump to the conclusion it's the lifter and cam I figured I'd ask you guys where I should start , truck has 350,000 klm and is a 2012 5.7 litre , New plugs were installed already but did nothing , thanks ahead of time

 

Getting any codes? How old are the plugs?

 

Cylinder 5 misfire code , plugs are new

 

What plugs are in there?